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Finding the Fourth Proportional to 486,089.40, 729,134.10 and 397,515.90

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Solution

The fourth proportional to 486,089.40, 729,134.10 and 397,515.90 is: 596,273.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,089.40 : 729,134.10 = 397,515.90 : x
  2. Step 2: Convert to fraction form
    486,089.40/729,134.10 = 397,515.90/x
  3. Step 3: Cross multiply
    486,089.40x = 729,134.10 × 397,515.90
  4. Step 4: Simplify right side
    486,089.40x = 289,842,397,982.19
  5. Step 5: Solve for x
    x = 289,842,397,982.19/486,089.40
  6. Step 6: Final answer
    x = 596,273.85

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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.