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Finding the Fourth Proportional to 293.27, 439.86 and 87.78

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Solution

The fourth proportional to 293.27, 439.86 and 87.78 is: 131.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.27 : 439.86 = 87.78 : x
  2. Step 2: Convert to fraction form
    293.27/439.86 = 87.78/x
  3. Step 3: Cross multiply
    293.27x = 439.86 × 87.78
  4. Step 4: Simplify right side
    293.27x = 38,610.91
  5. Step 5: Solve for x
    x = 38,610.91/293.27
  6. Step 6: Final answer
    x = 131.66

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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.