Home / 486,046.20-729,069.30-397,399.80

Finding the Fourth Proportional to 486,046.20, 729,069.30 and 397,399.80

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Solution

The fourth proportional to 486,046.20, 729,069.30 and 397,399.80 is: 596,099.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,046.20 : 729,069.30 = 397,399.80 : x
  2. Step 2: Convert to fraction form
    486,046.20/729,069.30 = 397,399.80/x
  3. Step 3: Cross multiply
    486,046.20x = 729,069.30 × 397,399.80
  4. Step 4: Simplify right side
    486,046.20x = 289,731,994,006.14
  5. Step 5: Solve for x
    x = 289,731,994,006.14/486,046.20
  6. Step 6: Final answer
    x = 596,099.70

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Double scale
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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.