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Finding the Fourth Proportional to 2,616.33, 3,925.07 and 861.87

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Solution

The fourth proportional to 2,616.33, 3,925.07 and 861.87 is: 1,293.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,616.33 : 3,925.07 = 861.87 : x
  2. Step 2: Convert to fraction form
    2,616.33/3,925.07 = 861.87/x
  3. Step 3: Cross multiply
    2,616.33x = 3,925.07 × 861.87
  4. Step 4: Simplify right side
    2,616.33x = 3,382,902.24
  5. Step 5: Solve for x
    x = 3,382,902.24/2,616.33
  6. Step 6: Final answer
    x = 1,293.00

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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.