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Finding the Fourth Proportional to 158.56, 217.52 and 154.29

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Solution

The fourth proportional to 158.56, 217.52 and 154.29 is: 211.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.56 : 217.52 = 154.29 : x
  2. Step 2: Convert to fraction form
    158.56/217.52 = 154.29/x
  3. Step 3: Cross multiply
    158.56x = 217.52 × 154.29
  4. Step 4: Simplify right side
    158.56x = 33,561.16
  5. Step 5: Solve for x
    x = 33,561.16/158.56
  6. Step 6: Final answer
    x = 211.66

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.