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Finding the Fourth Proportional to 215.43, 297.10 and 140.66

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Solution

The fourth proportional to 215.43, 297.10 and 140.66 is: 193.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.43 : 297.10 = 140.66 : x
  2. Step 2: Convert to fraction form
    215.43/297.10 = 140.66/x
  3. Step 3: Cross multiply
    215.43x = 297.10 × 140.66
  4. Step 4: Simplify right side
    215.43x = 41,790.09
  5. Step 5: Solve for x
    x = 41,790.09/215.43
  6. Step 6: Final answer
    x = 193.98

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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.