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Finding the Fourth Proportional to 721,877.05, 996,178.26 and 399,580.23

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Solution

The fourth proportional to 721,877.05, 996,178.26 and 399,580.23 is: 551,414.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,877.05 : 996,178.26 = 399,580.23 : x
  2. Step 2: Convert to fraction form
    721,877.05/996,178.26 = 399,580.23/x
  3. Step 3: Cross multiply
    721,877.05x = 996,178.26 × 399,580.23
  4. Step 4: Simplify right side
    721,877.05x = 398,053,138,251.80
  5. Step 5: Solve for x
    x = 398,053,138,251.80/721,877.05
  6. Step 6: Final answer
    x = 551,414.04

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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.