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Finding the Fourth Proportional to 484.48, 725.76 and 387.14

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Solution

The fourth proportional to 484.48, 725.76 and 387.14 is: 579.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.48 : 725.76 = 387.14 : x
  2. Step 2: Convert to fraction form
    484.48/725.76 = 387.14/x
  3. Step 3: Cross multiply
    484.48x = 725.76 × 387.14
  4. Step 4: Simplify right side
    484.48x = 280,970.73
  5. Step 5: Solve for x
    x = 280,970.73/484.48
  6. Step 6: Final answer
    x = 579.94

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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.