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Finding the Fourth Proportional to 212.85, 294.29 and 177.87

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Solution

The fourth proportional to 212.85, 294.29 and 177.87 is: 245.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.85 : 294.29 = 177.87 : x
  2. Step 2: Convert to fraction form
    212.85/294.29 = 177.87/x
  3. Step 3: Cross multiply
    212.85x = 294.29 × 177.87
  4. Step 4: Simplify right side
    212.85x = 52,344.47
  5. Step 5: Solve for x
    x = 52,344.47/212.85
  6. Step 6: Final answer
    x = 245.92

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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.