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Finding the Fourth Proportional to 240.23, 331.55 and 156.18

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Solution

The fourth proportional to 240.23, 331.55 and 156.18 is: 215.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.23 : 331.55 = 156.18 : x
  2. Step 2: Convert to fraction form
    240.23/331.55 = 156.18/x
  3. Step 3: Cross multiply
    240.23x = 331.55 × 156.18
  4. Step 4: Simplify right side
    240.23x = 51,781.87
  5. Step 5: Solve for x
    x = 51,781.87/240.23
  6. Step 6: Final answer
    x = 215.55

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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.