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Finding the Fourth Proportional to 247.55, 342.04 and 238.79

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Solution

The fourth proportional to 247.55, 342.04 and 238.79 is: 329.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.55 : 342.04 = 238.79 : x
  2. Step 2: Convert to fraction form
    247.55/342.04 = 238.79/x
  3. Step 3: Cross multiply
    247.55x = 342.04 × 238.79
  4. Step 4: Simplify right side
    247.55x = 81,673.42
  5. Step 5: Solve for x
    x = 81,673.42/247.55
  6. Step 6: Final answer
    x = 329.93

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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.