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Finding the Fourth Proportional to 221.68, 305.80 and 159.52

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Solution

The fourth proportional to 221.68, 305.80 and 159.52 is: 220.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.68 : 305.80 = 159.52 : x
  2. Step 2: Convert to fraction form
    221.68/305.80 = 159.52/x
  3. Step 3: Cross multiply
    221.68x = 305.80 × 159.52
  4. Step 4: Simplify right side
    221.68x = 48,781.22
  5. Step 5: Solve for x
    x = 48,781.22/221.68
  6. Step 6: Final answer
    x = 220.05

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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.