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Finding the Fourth Proportional to 1,281,547,538.80, 1,798,248,021.20 and 1,281,547,538.80

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Solution

The fourth proportional to 1,281,547,538.80, 1,798,248,021.20 and 1,281,547,538.80 is: 1,798,248,021.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281,547,538.80 : 1,798,248,021.20 = 1,281,547,538.80 : x
  2. Step 2: Convert to fraction form
    1,281,547,538.80/1,798,248,021.20 = 1,281,547,538.80/x
  3. Step 3: Cross multiply
    1,281,547,538.80x = 1,798,248,021.20 × 1,281,547,538.80
  4. Step 4: Simplify right side
    1,281,547,538.80x = 2,304,540,325,720,830,208
  5. Step 5: Solve for x
    x = 2,304,540,325,720,830,208/1,281,547,538.80
  6. Step 6: Final answer
    x = 1,798,248,021.20

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Half scale
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Double scale
Find fourth proportional to 1,281,547,539.80, 1,798,248,022.60 and 1,281,547,539.80
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.