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Finding the Fourth Proportional to 212.62, 293.66 and 142.57

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Solution

The fourth proportional to 212.62, 293.66 and 142.57 is: 196.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.62 : 293.66 = 142.57 : x
  2. Step 2: Convert to fraction form
    212.62/293.66 = 142.57/x
  3. Step 3: Cross multiply
    212.62x = 293.66 × 142.57
  4. Step 4: Simplify right side
    212.62x = 41,867.11
  5. Step 5: Solve for x
    x = 41,867.11/212.62
  6. Step 6: Final answer
    x = 196.91

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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.