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Finding the Fourth Proportional to 221.68, 332.66 and 84.74

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Solution

The fourth proportional to 221.68, 332.66 and 84.74 is: 127.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.68 : 332.66 = 84.74 : x
  2. Step 2: Convert to fraction form
    221.68/332.66 = 84.74/x
  3. Step 3: Cross multiply
    221.68x = 332.66 × 84.74
  4. Step 4: Simplify right side
    221.68x = 28,190.65
  5. Step 5: Solve for x
    x = 28,190.65/221.68
  6. Step 6: Final answer
    x = 127.17

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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.