Home / 688,030.80-1,031,642.28-208,114.20

Finding the Fourth Proportional to 688,030.80, 1,031,642.28 and 208,114.20

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Solution

The fourth proportional to 688,030.80, 1,031,642.28 and 208,114.20 is: 312,049.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,030.80 : 1,031,642.28 = 208,114.20 : x
  2. Step 2: Convert to fraction form
    688,030.80/1,031,642.28 = 208,114.20/x
  3. Step 3: Cross multiply
    688,030.80x = 1,031,642.28 × 208,114.20
  4. Step 4: Simplify right side
    688,030.80x = 214,699,407,788.38
  5. Step 5: Solve for x
    x = 214,699,407,788.38/688,030.80
  6. Step 6: Final answer
    x = 312,049.12

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.