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Finding the Fourth Proportional to 278.18, 418.11 and 224.74

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Solution

The fourth proportional to 278.18, 418.11 and 224.74 is: 337.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.18 : 418.11 = 224.74 : x
  2. Step 2: Convert to fraction form
    278.18/418.11 = 224.74/x
  3. Step 3: Cross multiply
    278.18x = 418.11 × 224.74
  4. Step 4: Simplify right side
    278.18x = 93,966.04
  5. Step 5: Solve for x
    x = 93,966.04/278.18
  6. Step 6: Final answer
    x = 337.79

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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.