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Finding the Fourth Proportional to 342.19, 512.92 and 125.70

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Solution

The fourth proportional to 342.19, 512.92 and 125.70 is: 188.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.19 : 512.92 = 125.70 : x
  2. Step 2: Convert to fraction form
    342.19/512.92 = 125.70/x
  3. Step 3: Cross multiply
    342.19x = 512.92 × 125.70
  4. Step 4: Simplify right side
    342.19x = 64,474.04
  5. Step 5: Solve for x
    x = 64,474.04/342.19
  6. Step 6: Final answer
    x = 188.42

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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.