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Finding the Fourth Proportional to 159.74, 220.46 and 152.81

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Solution

The fourth proportional to 159.74, 220.46 and 152.81 is: 210.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.74 : 220.46 = 152.81 : x
  2. Step 2: Convert to fraction form
    159.74/220.46 = 152.81/x
  3. Step 3: Cross multiply
    159.74x = 220.46 × 152.81
  4. Step 4: Simplify right side
    159.74x = 33,687.73
  5. Step 5: Solve for x
    x = 33,687.73/159.74
  6. Step 6: Final answer
    x = 210.90

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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.