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Finding the Fourth Proportional to 2,862.25, 3,949.91 and 1,620.25

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Solution

The fourth proportional to 2,862.25, 3,949.91 and 1,620.25 is: 2,235.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,862.25 : 3,949.91 = 1,620.25 : x
  2. Step 2: Convert to fraction form
    2,862.25/3,949.91 = 1,620.25/x
  3. Step 3: Cross multiply
    2,862.25x = 3,949.91 × 1,620.25
  4. Step 4: Simplify right side
    2,862.25x = 6,399,833.58
  5. Step 5: Solve for x
    x = 6,399,833.58/2,862.25
  6. Step 6: Final answer
    x = 2,235.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.