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Finding the Fourth Proportional to 279.21, 418.55 and 96.47

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Solution

The fourth proportional to 279.21, 418.55 and 96.47 is: 144.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.21 : 418.55 = 96.47 : x
  2. Step 2: Convert to fraction form
    279.21/418.55 = 96.47/x
  3. Step 3: Cross multiply
    279.21x = 418.55 × 96.47
  4. Step 4: Simplify right side
    279.21x = 40,377.52
  5. Step 5: Solve for x
    x = 40,377.52/279.21
  6. Step 6: Final answer
    x = 144.61

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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.