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Finding the Fourth Proportional to 247.39, 371.08 and 64.79

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Solution

The fourth proportional to 247.39, 371.08 and 64.79 is: 97.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.39 : 371.08 = 64.79 : x
  2. Step 2: Convert to fraction form
    247.39/371.08 = 64.79/x
  3. Step 3: Cross multiply
    247.39x = 371.08 × 64.79
  4. Step 4: Simplify right side
    247.39x = 24,040.85
  5. Step 5: Solve for x
    x = 24,040.85/247.39
  6. Step 6: Final answer
    x = 97.18

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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.