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Finding the Fourth Proportional to 342.65, 514.18 and 126.38

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Solution

The fourth proportional to 342.65, 514.18 and 126.38 is: 189.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.65 : 514.18 = 126.38 : x
  2. Step 2: Convert to fraction form
    342.65/514.18 = 126.38/x
  3. Step 3: Cross multiply
    342.65x = 514.18 × 126.38
  4. Step 4: Simplify right side
    342.65x = 64,983.04
  5. Step 5: Solve for x
    x = 64,983.04/342.65
  6. Step 6: Final answer
    x = 189.65

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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.