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Finding the Fourth Proportional to 243.53, 335.19 and 212.55

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Solution

The fourth proportional to 243.53, 335.19 and 212.55 is: 292.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.53 : 335.19 = 212.55 : x
  2. Step 2: Convert to fraction form
    243.53/335.19 = 212.55/x
  3. Step 3: Cross multiply
    243.53x = 335.19 × 212.55
  4. Step 4: Simplify right side
    243.53x = 71,243.92
  5. Step 5: Solve for x
    x = 71,243.92/243.53
  6. Step 6: Final answer
    x = 292.54

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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.