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Finding the Fourth Proportional to 342.97, 514.52 and 126.55

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Solution

The fourth proportional to 342.97, 514.52 and 126.55 is: 189.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.97 : 514.52 = 126.55 : x
  2. Step 2: Convert to fraction form
    342.97/514.52 = 126.55/x
  3. Step 3: Cross multiply
    342.97x = 514.52 × 126.55
  4. Step 4: Simplify right side
    342.97x = 65,111.87
  5. Step 5: Solve for x
    x = 65,111.87/342.97
  6. Step 6: Final answer
    x = 189.85

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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.