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Finding the Fourth Proportional to 483,105.40, 724,658.10 and 478,439.80

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Solution

The fourth proportional to 483,105.40, 724,658.10 and 478,439.80 is: 717,659.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,105.40 : 724,658.10 = 478,439.80 : x
  2. Step 2: Convert to fraction form
    483,105.40/724,658.10 = 478,439.80/x
  3. Step 3: Cross multiply
    483,105.40x = 724,658.10 × 478,439.80
  4. Step 4: Simplify right side
    483,105.40x = 346,705,276,432.38
  5. Step 5: Solve for x
    x = 346,705,276,432.38/483,105.40
  6. Step 6: Final answer
    x = 717,659.70

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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.