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Finding the Fourth Proportional to 3,279.52, 4,919.52 and 971.20

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Solution

The fourth proportional to 3,279.52, 4,919.52 and 971.20 is: 1,456.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,279.52 : 4,919.52 = 971.20 : x
  2. Step 2: Convert to fraction form
    3,279.52/4,919.52 = 971.20/x
  3. Step 3: Cross multiply
    3,279.52x = 4,919.52 × 971.20
  4. Step 4: Simplify right side
    3,279.52x = 4,777,837.82
  5. Step 5: Solve for x
    x = 4,777,837.82/3,279.52
  6. Step 6: Final answer
    x = 1,456.87

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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.