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Finding the Fourth Proportional to 721,841.32, 996,115.62 and 399,552.04

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Solution

The fourth proportional to 721,841.32, 996,115.62 and 399,552.04 is: 551,367.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,841.32 : 996,115.62 = 399,552.04 : x
  2. Step 2: Convert to fraction form
    721,841.32/996,115.62 = 399,552.04/x
  3. Step 3: Cross multiply
    721,841.32x = 996,115.62 × 399,552.04
  4. Step 4: Simplify right side
    721,841.32x = 398,000,028,046.87
  5. Step 5: Solve for x
    x = 398,000,028,046.87/721,841.32
  6. Step 6: Final answer
    x = 551,367.75

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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.