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Finding the Fourth Proportional to 212.25, 292.91 and 134.63

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Solution

The fourth proportional to 212.25, 292.91 and 134.63 is: 185.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.25 : 292.91 = 134.63 : x
  2. Step 2: Convert to fraction form
    212.25/292.91 = 134.63/x
  3. Step 3: Cross multiply
    212.25x = 292.91 × 134.63
  4. Step 4: Simplify right side
    212.25x = 39,432.34
  5. Step 5: Solve for x
    x = 39,432.34/212.25
  6. Step 6: Final answer
    x = 185.78

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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.