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Finding the Fourth Proportional to 247.13, 342.67 and 238.93

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Solution

The fourth proportional to 247.13, 342.67 and 238.93 is: 331.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.13 : 342.67 = 238.93 : x
  2. Step 2: Convert to fraction form
    247.13/342.67 = 238.93/x
  3. Step 3: Cross multiply
    247.13x = 342.67 × 238.93
  4. Step 4: Simplify right side
    247.13x = 81,874.14
  5. Step 5: Solve for x
    x = 81,874.14/247.13
  6. Step 6: Final answer
    x = 331.30

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.