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Finding the Fourth Proportional to 215.78, 297.90 and 132.92

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Solution

The fourth proportional to 215.78, 297.90 and 132.92 is: 183.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.78 : 297.90 = 132.92 : x
  2. Step 2: Convert to fraction form
    215.78/297.90 = 132.92/x
  3. Step 3: Cross multiply
    215.78x = 297.90 × 132.92
  4. Step 4: Simplify right side
    215.78x = 39,596.87
  5. Step 5: Solve for x
    x = 39,596.87/215.78
  6. Step 6: Final answer
    x = 183.51

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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.