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Finding the Fourth Proportional to 278.60, 387.03 and 270.44

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Solution

The fourth proportional to 278.60, 387.03 and 270.44 is: 375.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.60 : 387.03 = 270.44 : x
  2. Step 2: Convert to fraction form
    278.60/387.03 = 270.44/x
  3. Step 3: Cross multiply
    278.60x = 387.03 × 270.44
  4. Step 4: Simplify right side
    278.60x = 104,668.39
  5. Step 5: Solve for x
    x = 104,668.39/278.60
  6. Step 6: Final answer
    x = 375.69

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.