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Finding the Fourth Proportional to 215.90, 297.92 and 178.91

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Solution

The fourth proportional to 215.90, 297.92 and 178.91 is: 246.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.90 : 297.92 = 178.91 : x
  2. Step 2: Convert to fraction form
    215.90/297.92 = 178.91/x
  3. Step 3: Cross multiply
    215.90x = 297.92 × 178.91
  4. Step 4: Simplify right side
    215.90x = 53,299.97
  5. Step 5: Solve for x
    x = 53,299.97/215.90
  6. Step 6: Final answer
    x = 246.87

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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.