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Finding the Fourth Proportional to 489.38, 734.06 and 147.38

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Solution

The fourth proportional to 489.38, 734.06 and 147.38 is: 221.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.38 : 734.06 = 147.38 : x
  2. Step 2: Convert to fraction form
    489.38/734.06 = 147.38/x
  3. Step 3: Cross multiply
    489.38x = 734.06 × 147.38
  4. Step 4: Simplify right side
    489.38x = 108,182.46
  5. Step 5: Solve for x
    x = 108,182.46/489.38
  6. Step 6: Final answer
    x = 221.06

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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.