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Finding the Fourth Proportional to 240.45, 331.70 and 157.52

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Solution

The fourth proportional to 240.45, 331.70 and 157.52 is: 217.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.45 : 331.70 = 157.52 : x
  2. Step 2: Convert to fraction form
    240.45/331.70 = 157.52/x
  3. Step 3: Cross multiply
    240.45x = 331.70 × 157.52
  4. Step 4: Simplify right side
    240.45x = 52,248.14
  5. Step 5: Solve for x
    x = 52,248.14/240.45
  6. Step 6: Final answer
    x = 217.30

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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.