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Finding the Fourth Proportional to 342.97, 513.34 and 251.65

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Solution

The fourth proportional to 342.97, 513.34 and 251.65 is: 376.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.97 : 513.34 = 251.65 : x
  2. Step 2: Convert to fraction form
    342.97/513.34 = 251.65/x
  3. Step 3: Cross multiply
    342.97x = 513.34 × 251.65
  4. Step 4: Simplify right side
    342.97x = 129,182.01
  5. Step 5: Solve for x
    x = 129,182.01/342.97
  6. Step 6: Final answer
    x = 376.66

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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.