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Finding the Fourth Proportional to 417.76, 626.82 and 225.52

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Solution

The fourth proportional to 417.76, 626.82 and 225.52 is: 338.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.76 : 626.82 = 225.52 : x
  2. Step 2: Convert to fraction form
    417.76/626.82 = 225.52/x
  3. Step 3: Cross multiply
    417.76x = 626.82 × 225.52
  4. Step 4: Simplify right side
    417.76x = 141,360.45
  5. Step 5: Solve for x
    x = 141,360.45/417.76
  6. Step 6: Final answer
    x = 338.38

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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.