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Finding the Fourth Proportional to 2,247.62, 3,371.88 and 687.84

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Solution

The fourth proportional to 2,247.62, 3,371.88 and 687.84 is: 1,031.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,247.62 : 3,371.88 = 687.84 : x
  2. Step 2: Convert to fraction form
    2,247.62/3,371.88 = 687.84/x
  3. Step 3: Cross multiply
    2,247.62x = 3,371.88 × 687.84
  4. Step 4: Simplify right side
    2,247.62x = 2,319,313.94
  5. Step 5: Solve for x
    x = 2,319,313.94/2,247.62
  6. Step 6: Final answer
    x = 1,031.90

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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.