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Finding the Fourth Proportional to 215.26, 322.68 and 118.87

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Solution

The fourth proportional to 215.26, 322.68 and 118.87 is: 178.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.26 : 322.68 = 118.87 : x
  2. Step 2: Convert to fraction form
    215.26/322.68 = 118.87/x
  3. Step 3: Cross multiply
    215.26x = 322.68 × 118.87
  4. Step 4: Simplify right side
    215.26x = 38,356.61
  5. Step 5: Solve for x
    x = 38,356.61/215.26
  6. Step 6: Final answer
    x = 178.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.