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Finding the Fourth Proportional to 310.27, 428.42 and 240.22

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Solution

The fourth proportional to 310.27, 428.42 and 240.22 is: 331.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.27 : 428.42 = 240.22 : x
  2. Step 2: Convert to fraction form
    310.27/428.42 = 240.22/x
  3. Step 3: Cross multiply
    310.27x = 428.42 × 240.22
  4. Step 4: Simplify right side
    310.27x = 102,915.05
  5. Step 5: Solve for x
    x = 102,915.05/310.27
  6. Step 6: Final answer
    x = 331.70

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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.