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Finding the Fourth Proportional to 159.57, 221.33 and 155.52

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Solution

The fourth proportional to 159.57, 221.33 and 155.52 is: 215.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.57 : 221.33 = 155.52 : x
  2. Step 2: Convert to fraction form
    159.57/221.33 = 155.52/x
  3. Step 3: Cross multiply
    159.57x = 221.33 × 155.52
  4. Step 4: Simplify right side
    159.57x = 34,421.63
  5. Step 5: Solve for x
    x = 34,421.63/159.57
  6. Step 6: Final answer
    x = 215.71

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.