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Finding the Fourth Proportional to 212.29, 292.90 and 133.57

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Solution

The fourth proportional to 212.29, 292.90 and 133.57 is: 184.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.29 : 292.90 = 133.57 : x
  2. Step 2: Convert to fraction form
    212.29/292.90 = 133.57/x
  3. Step 3: Cross multiply
    212.29x = 292.90 × 133.57
  4. Step 4: Simplify right side
    212.29x = 39,121.99
  5. Step 5: Solve for x
    x = 39,121.99/212.29
  6. Step 6: Final answer
    x = 184.29

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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.