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Finding the Fourth Proportional to 220.64, 330.85 and 98.83

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Solution

The fourth proportional to 220.64, 330.85 and 98.83 is: 148.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.64 : 330.85 = 98.83 : x
  2. Step 2: Convert to fraction form
    220.64/330.85 = 98.83/x
  3. Step 3: Cross multiply
    220.64x = 330.85 × 98.83
  4. Step 4: Simplify right side
    220.64x = 32,697.41
  5. Step 5: Solve for x
    x = 32,697.41/220.64
  6. Step 6: Final answer
    x = 148.19

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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.