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Finding the Fourth Proportional to 721,812.47, 996,110.06 and 399,552.62

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Solution

The fourth proportional to 721,812.47, 996,110.06 and 399,552.62 is: 551,387.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,812.47 : 996,110.06 = 399,552.62 : x
  2. Step 2: Convert to fraction form
    721,812.47/996,110.06 = 399,552.62/x
  3. Step 3: Cross multiply
    721,812.47x = 996,110.06 × 399,552.62
  4. Step 4: Simplify right side
    721,812.47x = 397,998,377,303.04
  5. Step 5: Solve for x
    x = 397,998,377,303.04/721,812.47
  6. Step 6: Final answer
    x = 551,387.51

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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.