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Finding the Fourth Proportional to 247.61, 341.64 and 142.69

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Solution

The fourth proportional to 247.61, 341.64 and 142.69 is: 196.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.61 : 341.64 = 142.69 : x
  2. Step 2: Convert to fraction form
    247.61/341.64 = 142.69/x
  3. Step 3: Cross multiply
    247.61x = 341.64 × 142.69
  4. Step 4: Simplify right side
    247.61x = 48,749.57
  5. Step 5: Solve for x
    x = 48,749.57/247.61
  6. Step 6: Final answer
    x = 196.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.