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Finding the Fourth Proportional to 217.08, 299.25 and 158.76

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Solution

The fourth proportional to 217.08, 299.25 and 158.76 is: 218.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.08 : 299.25 = 158.76 : x
  2. Step 2: Convert to fraction form
    217.08/299.25 = 158.76/x
  3. Step 3: Cross multiply
    217.08x = 299.25 × 158.76
  4. Step 4: Simplify right side
    217.08x = 47,508.93
  5. Step 5: Solve for x
    x = 47,508.93/217.08
  6. Step 6: Final answer
    x = 218.85

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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.