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Finding the Fourth Proportional to 353.10, 529.78 and 147.61

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Solution

The fourth proportional to 353.10, 529.78 and 147.61 is: 221.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.10 : 529.78 = 147.61 : x
  2. Step 2: Convert to fraction form
    353.10/529.78 = 147.61/x
  3. Step 3: Cross multiply
    353.10x = 529.78 × 147.61
  4. Step 4: Simplify right side
    353.10x = 78,200.83
  5. Step 5: Solve for x
    x = 78,200.83/353.10
  6. Step 6: Final answer
    x = 221.47

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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.