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Finding the Fourth Proportional to 404.32, 606.40 and 147.76

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Solution

The fourth proportional to 404.32, 606.40 and 147.76 is: 221.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.32 : 606.40 = 147.76 : x
  2. Step 2: Convert to fraction form
    404.32/606.40 = 147.76/x
  3. Step 3: Cross multiply
    404.32x = 606.40 × 147.76
  4. Step 4: Simplify right side
    404.32x = 89,601.66
  5. Step 5: Solve for x
    x = 89,601.66/404.32
  6. Step 6: Final answer
    x = 221.61

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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.