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Finding the Fourth Proportional to 220.64, 331.56 and 112.50

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Solution

The fourth proportional to 220.64, 331.56 and 112.50 is: 169.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.64 : 331.56 = 112.50 : x
  2. Step 2: Convert to fraction form
    220.64/331.56 = 112.50/x
  3. Step 3: Cross multiply
    220.64x = 331.56 × 112.50
  4. Step 4: Simplify right side
    220.64x = 37,300.50
  5. Step 5: Solve for x
    x = 37,300.50/220.64
  6. Step 6: Final answer
    x = 169.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.