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Finding the Fourth Proportional to 278.44, 418.38 and 246.76

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Solution

The fourth proportional to 278.44, 418.38 and 246.76 is: 370.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.44 : 418.38 = 246.76 : x
  2. Step 2: Convert to fraction form
    278.44/418.38 = 246.76/x
  3. Step 3: Cross multiply
    278.44x = 418.38 × 246.76
  4. Step 4: Simplify right side
    278.44x = 103,239.45
  5. Step 5: Solve for x
    x = 103,239.45/278.44
  6. Step 6: Final answer
    x = 370.78

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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.