Home / 721,754,436.78-995,850,411.12-408,488,650.65

Finding the Fourth Proportional to 721,754,436.78, 995,850,411.12 and 408,488,650.65

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Solution

The fourth proportional to 721,754,436.78, 995,850,411.12 and 408,488,650.65 is: 563,617,720.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,754,436.78 : 995,850,411.12 = 408,488,650.65 : x
  2. Step 2: Convert to fraction form
    721,754,436.78/995,850,411.12 = 408,488,650.65/x
  3. Step 3: Cross multiply
    721,754,436.78x = 995,850,411.12 × 408,488,650.65
  4. Step 4: Simplify right side
    721,754,436.78x = 406,793,590,687,656,512
  5. Step 5: Solve for x
    x = 406,793,590,687,656,512/721,754,436.78
  6. Step 6: Final answer
    x = 563,617,720.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.