Home / 1,287,248,547.80-1,930,872,821.70-771,270,512.60

Finding the Fourth Proportional to 1,287,248,547.80, 1,930,872,821.70 and 771,270,512.60

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Solution

The fourth proportional to 1,287,248,547.80, 1,930,872,821.70 and 771,270,512.60 is: 1,156,905,768.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,248,547.80 : 1,930,872,821.70 = 771,270,512.60 : x
  2. Step 2: Convert to fraction form
    1,287,248,547.80/1,930,872,821.70 = 771,270,512.60/x
  3. Step 3: Cross multiply
    1,287,248,547.80x = 1,930,872,821.70 × 771,270,512.60
  4. Step 4: Simplify right side
    1,287,248,547.80x = 1,489,225,270,957,967,360
  5. Step 5: Solve for x
    x = 1,489,225,270,957,967,360/1,287,248,547.80
  6. Step 6: Final answer
    x = 1,156,905,768.90

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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.