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Finding the Fourth Proportional to 278.66, 417.54 and 95.96

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Solution

The fourth proportional to 278.66, 417.54 and 95.96 is: 143.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.66 : 417.54 = 95.96 : x
  2. Step 2: Convert to fraction form
    278.66/417.54 = 95.96/x
  3. Step 3: Cross multiply
    278.66x = 417.54 × 95.96
  4. Step 4: Simplify right side
    278.66x = 40,067.14
  5. Step 5: Solve for x
    x = 40,067.14/278.66
  6. Step 6: Final answer
    x = 143.79

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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.