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Finding the Fourth Proportional to 158.92, 220.37 and 153.74

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Solution

The fourth proportional to 158.92, 220.37 and 153.74 is: 213.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.92 : 220.37 = 153.74 : x
  2. Step 2: Convert to fraction form
    158.92/220.37 = 153.74/x
  3. Step 3: Cross multiply
    158.92x = 220.37 × 153.74
  4. Step 4: Simplify right side
    158.92x = 33,878.78
  5. Step 5: Solve for x
    x = 33,878.78/158.92
  6. Step 6: Final answer
    x = 213.18

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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.