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Finding the Fourth Proportional to 242.88, 363.15 and 209.04

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Solution

The fourth proportional to 242.88, 363.15 and 209.04 is: 312.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.88 : 363.15 = 209.04 : x
  2. Step 2: Convert to fraction form
    242.88/363.15 = 209.04/x
  3. Step 3: Cross multiply
    242.88x = 363.15 × 209.04
  4. Step 4: Simplify right side
    242.88x = 75,912.88
  5. Step 5: Solve for x
    x = 75,912.88/242.88
  6. Step 6: Final answer
    x = 312.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.