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Finding the Fourth Proportional to 2,634.89, 3,952.02 and 687.25

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Solution

The fourth proportional to 2,634.89, 3,952.02 and 687.25 is: 1,030.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,634.89 : 3,952.02 = 687.25 : x
  2. Step 2: Convert to fraction form
    2,634.89/3,952.02 = 687.25/x
  3. Step 3: Cross multiply
    2,634.89x = 3,952.02 × 687.25
  4. Step 4: Simplify right side
    2,634.89x = 2,716,025.75
  5. Step 5: Solve for x
    x = 2,716,025.75/2,634.89
  6. Step 6: Final answer
    x = 1,030.79

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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.