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Finding the Fourth Proportional to 721,894.43, 996,171.51 and 399,585.31

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Solution

The fourth proportional to 721,894.43, 996,171.51 and 399,585.31 is: 551,404.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,894.43 : 996,171.51 = 399,585.31 : x
  2. Step 2: Convert to fraction form
    721,894.43/996,171.51 = 399,585.31/x
  3. Step 3: Cross multiply
    721,894.43x = 996,171.51 × 399,585.31
  4. Step 4: Simplify right side
    721,894.43x = 398,055,499,146.09
  5. Step 5: Solve for x
    x = 398,055,499,146.09/721,894.43
  6. Step 6: Final answer
    x = 551,404.03

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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.