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Finding the Fourth Proportional to 212.17, 292.85 and 134.50

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Solution

The fourth proportional to 212.17, 292.85 and 134.50 is: 185.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.17 : 292.85 = 134.50 : x
  2. Step 2: Convert to fraction form
    212.17/292.85 = 134.50/x
  3. Step 3: Cross multiply
    212.17x = 292.85 × 134.50
  4. Step 4: Simplify right side
    212.17x = 39,388.33
  5. Step 5: Solve for x
    x = 39,388.33/212.17
  6. Step 6: Final answer
    x = 185.65

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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.