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Finding the Fourth Proportional to 819.18, 1,228.80 and 242.04

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Solution

The fourth proportional to 819.18, 1,228.80 and 242.04 is: 363.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    819.18 : 1,228.80 = 242.04 : x
  2. Step 2: Convert to fraction form
    819.18/1,228.80 = 242.04/x
  3. Step 3: Cross multiply
    819.18x = 1,228.80 × 242.04
  4. Step 4: Simplify right side
    819.18x = 297,418.75
  5. Step 5: Solve for x
    x = 297,418.75/819.18
  6. Step 6: Final answer
    x = 363.07

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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.