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Finding the Fourth Proportional to 220.88, 331.19 and 99.02

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Solution

The fourth proportional to 220.88, 331.19 and 99.02 is: 148.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.88 : 331.19 = 99.02 : x
  2. Step 2: Convert to fraction form
    220.88/331.19 = 99.02/x
  3. Step 3: Cross multiply
    220.88x = 331.19 × 99.02
  4. Step 4: Simplify right side
    220.88x = 32,795.14
  5. Step 5: Solve for x
    x = 32,795.14/220.88
  6. Step 6: Final answer
    x = 148.48

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