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Finding the Fourth Proportional to 486,428.80, 729,643.20 and 131,432.80

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Solution

The fourth proportional to 486,428.80, 729,643.20 and 131,432.80 is: 197,149.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,428.80 : 729,643.20 = 131,432.80 : x
  2. Step 2: Convert to fraction form
    486,428.80/729,643.20 = 131,432.80/x
  3. Step 3: Cross multiply
    486,428.80x = 729,643.20 × 131,432.80
  4. Step 4: Simplify right side
    486,428.80x = 95,899,048,776.96
  5. Step 5: Solve for x
    x = 95,899,048,776.96/486,428.80
  6. Step 6: Final answer
    x = 197,149.20

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Similar ratio
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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.