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Finding the Fourth Proportional to 342.27, 513.35 and 147.16

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Solution

The fourth proportional to 342.27, 513.35 and 147.16 is: 220.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.27 : 513.35 = 147.16 : x
  2. Step 2: Convert to fraction form
    342.27/513.35 = 147.16/x
  3. Step 3: Cross multiply
    342.27x = 513.35 × 147.16
  4. Step 4: Simplify right side
    342.27x = 75,543.85
  5. Step 5: Solve for x
    x = 75,543.85/342.27
  6. Step 6: Final answer
    x = 220.71

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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.