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Finding the Fourth Proportional to 245.79, 340.92 and 239.13

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Solution

The fourth proportional to 245.79, 340.92 and 239.13 is: 331.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.79 : 340.92 = 239.13 : x
  2. Step 2: Convert to fraction form
    245.79/340.92 = 239.13/x
  3. Step 3: Cross multiply
    245.79x = 340.92 × 239.13
  4. Step 4: Simplify right side
    245.79x = 81,524.20
  5. Step 5: Solve for x
    x = 81,524.20/245.79
  6. Step 6: Final answer
    x = 331.68

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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.