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Finding the Fourth Proportional to 522,482,989.49, 721,026,643.19 and 287,533,649.97

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Solution

The fourth proportional to 522,482,989.49, 721,026,643.19 and 287,533,649.97 is: 396,796,501.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,482,989.49 : 721,026,643.19 = 287,533,649.97 : x
  2. Step 2: Convert to fraction form
    522,482,989.49/721,026,643.19 = 287,533,649.97/x
  3. Step 3: Cross multiply
    522,482,989.49x = 721,026,643.19 × 287,533,649.97
  4. Step 4: Simplify right side
    522,482,989.49x = 207,319,422,443,441,344
  5. Step 5: Solve for x
    x = 207,319,422,443,441,344/522,482,989.49
  6. Step 6: Final answer
    x = 396,796,501.73

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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.