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Finding the Fourth Proportional to 472.18, 708.22 and 147.54

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Solution

The fourth proportional to 472.18, 708.22 and 147.54 is: 221.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.18 : 708.22 = 147.54 : x
  2. Step 2: Convert to fraction form
    472.18/708.22 = 147.54/x
  3. Step 3: Cross multiply
    472.18x = 708.22 × 147.54
  4. Step 4: Simplify right side
    472.18x = 104,490.78
  5. Step 5: Solve for x
    x = 104,490.78/472.18
  6. Step 6: Final answer
    x = 221.29

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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.