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Finding the Fourth Proportional to 221.83, 306.19 and 177.87

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Solution

The fourth proportional to 221.83, 306.19 and 177.87 is: 245.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.83 : 306.19 = 177.87 : x
  2. Step 2: Convert to fraction form
    221.83/306.19 = 177.87/x
  3. Step 3: Cross multiply
    221.83x = 306.19 × 177.87
  4. Step 4: Simplify right side
    221.83x = 54,463.39
  5. Step 5: Solve for x
    x = 54,463.39/221.83
  6. Step 6: Final answer
    x = 245.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.