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Finding the Fourth Proportional to 721,958.34, 996,270.20 and 399,645.66

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Solution

The fourth proportional to 721,958.34, 996,270.20 and 399,645.66 is: 551,493.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,958.34 : 996,270.20 = 399,645.66 : x
  2. Step 2: Convert to fraction form
    721,958.34/996,270.20 = 399,645.66/x
  3. Step 3: Cross multiply
    721,958.34x = 996,270.20 × 399,645.66
  4. Step 4: Simplify right side
    721,958.34x = 398,155,061,617.33
  5. Step 5: Solve for x
    x = 398,155,061,617.33/721,958.34
  6. Step 6: Final answer
    x = 551,493.13

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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.