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Finding the Fourth Proportional to 240.39, 331.59 and 178.20

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Solution

The fourth proportional to 240.39, 331.59 and 178.20 is: 245.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.39 : 331.59 = 178.20 : x
  2. Step 2: Convert to fraction form
    240.39/331.59 = 178.20/x
  3. Step 3: Cross multiply
    240.39x = 331.59 × 178.20
  4. Step 4: Simplify right side
    240.39x = 59,089.34
  5. Step 5: Solve for x
    x = 59,089.34/240.39
  6. Step 6: Final answer
    x = 245.81

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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.