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Finding the Fourth Proportional to 247.92, 342.56 and 239.16

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Solution

The fourth proportional to 247.92, 342.56 and 239.16 is: 330.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.92 : 342.56 = 239.16 : x
  2. Step 2: Convert to fraction form
    247.92/342.56 = 239.16/x
  3. Step 3: Cross multiply
    247.92x = 342.56 × 239.16
  4. Step 4: Simplify right side
    247.92x = 81,925.45
  5. Step 5: Solve for x
    x = 81,925.45/247.92
  6. Step 6: Final answer
    x = 330.45

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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.