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Finding the Fourth Proportional to 417.92, 627.24 and 225.68

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Solution

The fourth proportional to 417.92, 627.24 and 225.68 is: 338.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.92 : 627.24 = 225.68 : x
  2. Step 2: Convert to fraction form
    417.92/627.24 = 225.68/x
  3. Step 3: Cross multiply
    417.92x = 627.24 × 225.68
  4. Step 4: Simplify right side
    417.92x = 141,555.52
  5. Step 5: Solve for x
    x = 141,555.52/417.92
  6. Step 6: Final answer
    x = 338.71

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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.