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Finding the Fourth Proportional to 3,279.87, 4,916.52 and 1,330.65

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Solution

The fourth proportional to 3,279.87, 4,916.52 and 1,330.65 is: 1,994.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,279.87 : 4,916.52 = 1,330.65 : x
  2. Step 2: Convert to fraction form
    3,279.87/4,916.52 = 1,330.65/x
  3. Step 3: Cross multiply
    3,279.87x = 4,916.52 × 1,330.65
  4. Step 4: Simplify right side
    3,279.87x = 6,542,167.34
  5. Step 5: Solve for x
    x = 6,542,167.34/3,279.87
  6. Step 6: Final answer
    x = 1,994.64

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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.