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Finding the Fourth Proportional to 486,957.90, 729,124.65 and 381,981.90

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Solution

The fourth proportional to 486,957.90, 729,124.65 and 381,981.90 is: 571,943.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,957.90 : 729,124.65 = 381,981.90 : x
  2. Step 2: Convert to fraction form
    486,957.90/729,124.65 = 381,981.90/x
  3. Step 3: Cross multiply
    486,957.90x = 729,124.65 × 381,981.90
  4. Step 4: Simplify right side
    486,957.90x = 278,512,419,143.84
  5. Step 5: Solve for x
    x = 278,512,419,143.84/486,957.90
  6. Step 6: Final answer
    x = 571,943.53

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.