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Finding the Fourth Proportional to 215.65, 297.64 and 132.79

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Solution

The fourth proportional to 215.65, 297.64 and 132.79 is: 183.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.65 : 297.64 = 132.79 : x
  2. Step 2: Convert to fraction form
    215.65/297.64 = 132.79/x
  3. Step 3: Cross multiply
    215.65x = 297.64 × 132.79
  4. Step 4: Simplify right side
    215.65x = 39,523.62
  5. Step 5: Solve for x
    x = 39,523.62/215.65
  6. Step 6: Final answer
    x = 183.28

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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.