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Finding the Fourth Proportional to 2,508.87, 3,762.80 and 865.59

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Solution

The fourth proportional to 2,508.87, 3,762.80 and 865.59 is: 1,298.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,508.87 : 3,762.80 = 865.59 : x
  2. Step 2: Convert to fraction form
    2,508.87/3,762.80 = 865.59/x
  3. Step 3: Cross multiply
    2,508.87x = 3,762.80 × 865.59
  4. Step 4: Simplify right side
    2,508.87x = 3,257,031.73
  5. Step 5: Solve for x
    x = 3,257,031.73/2,508.87
  6. Step 6: Final answer
    x = 1,298.20

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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.