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Finding the Fourth Proportional to 220.16, 331.55 and 159.72

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Solution

The fourth proportional to 220.16, 331.55 and 159.72 is: 240.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.16 : 331.55 = 159.72 : x
  2. Step 2: Convert to fraction form
    220.16/331.55 = 159.72/x
  3. Step 3: Cross multiply
    220.16x = 331.55 × 159.72
  4. Step 4: Simplify right side
    220.16x = 52,955.17
  5. Step 5: Solve for x
    x = 52,955.17/220.16
  6. Step 6: Final answer
    x = 240.53

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.