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Finding the Fourth Proportional to 472.38, 708.32 and 147.66

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Solution

The fourth proportional to 472.38, 708.32 and 147.66 is: 221.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.38 : 708.32 = 147.66 : x
  2. Step 2: Convert to fraction form
    472.38/708.32 = 147.66/x
  3. Step 3: Cross multiply
    472.38x = 708.32 × 147.66
  4. Step 4: Simplify right side
    472.38x = 104,590.53
  5. Step 5: Solve for x
    x = 104,590.53/472.38
  6. Step 6: Final answer
    x = 221.41

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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.