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Finding the Fourth Proportional to 331.89, 457.50 and 238.74

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Solution

The fourth proportional to 331.89, 457.50 and 238.74 is: 329.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.89 : 457.50 = 238.74 : x
  2. Step 2: Convert to fraction form
    331.89/457.50 = 238.74/x
  3. Step 3: Cross multiply
    331.89x = 457.50 × 238.74
  4. Step 4: Simplify right side
    331.89x = 109,223.55
  5. Step 5: Solve for x
    x = 109,223.55/331.89
  6. Step 6: Final answer
    x = 329.10

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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.