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Finding the Fourth Proportional to 215.43, 297.26 and 126.89

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Solution

The fourth proportional to 215.43, 297.26 and 126.89 is: 175.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.43 : 297.26 = 126.89 : x
  2. Step 2: Convert to fraction form
    215.43/297.26 = 126.89/x
  3. Step 3: Cross multiply
    215.43x = 297.26 × 126.89
  4. Step 4: Simplify right side
    215.43x = 37,719.32
  5. Step 5: Solve for x
    x = 37,719.32/215.43
  6. Step 6: Final answer
    x = 175.09

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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.