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Finding the Fourth Proportional to 482,136.60, 665,337.06 and 278,187.96

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Solution

The fourth proportional to 482,136.60, 665,337.06 and 278,187.96 is: 383,892.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,136.60 : 665,337.06 = 278,187.96 : x
  2. Step 2: Convert to fraction form
    482,136.60/665,337.06 = 278,187.96/x
  3. Step 3: Cross multiply
    482,136.60x = 665,337.06 × 278,187.96
  4. Step 4: Simplify right side
    482,136.60x = 185,088,759,433.80
  5. Step 5: Solve for x
    x = 185,088,759,433.80/482,136.60
  6. Step 6: Final answer
    x = 383,892.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.