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Finding the Fourth Proportional to 215.87, 297.97 and 127.38

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Solution

The fourth proportional to 215.87, 297.97 and 127.38 is: 175.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.87 : 297.97 = 127.38 : x
  2. Step 2: Convert to fraction form
    215.87/297.97 = 127.38/x
  3. Step 3: Cross multiply
    215.87x = 297.97 × 127.38
  4. Step 4: Simplify right side
    215.87x = 37,955.42
  5. Step 5: Solve for x
    x = 37,955.42/215.87
  6. Step 6: Final answer
    x = 175.83

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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.