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Finding the Fourth Proportional to 221.28, 332.02 and 156.69

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Solution

The fourth proportional to 221.28, 332.02 and 156.69 is: 235.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.28 : 332.02 = 156.69 : x
  2. Step 2: Convert to fraction form
    221.28/332.02 = 156.69/x
  3. Step 3: Cross multiply
    221.28x = 332.02 × 156.69
  4. Step 4: Simplify right side
    221.28x = 52,024.21
  5. Step 5: Solve for x
    x = 52,024.21/221.28
  6. Step 6: Final answer
    x = 235.11

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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.