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Finding the Fourth Proportional to 215.59, 297.54 and 142.12

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Solution

The fourth proportional to 215.59, 297.54 and 142.12 is: 196.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.59 : 297.54 = 142.12 : x
  2. Step 2: Convert to fraction form
    215.59/297.54 = 142.12/x
  3. Step 3: Cross multiply
    215.59x = 297.54 × 142.12
  4. Step 4: Simplify right side
    215.59x = 42,286.38
  5. Step 5: Solve for x
    x = 42,286.38/215.59
  6. Step 6: Final answer
    x = 196.14

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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.