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Finding the Fourth Proportional to 1,854.97, 2,781.92 and 1,209.13

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Solution

The fourth proportional to 1,854.97, 2,781.92 and 1,209.13 is: 1,813.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,854.97 : 2,781.92 = 1,209.13 : x
  2. Step 2: Convert to fraction form
    1,854.97/2,781.92 = 1,209.13/x
  3. Step 3: Cross multiply
    1,854.97x = 2,781.92 × 1,209.13
  4. Step 4: Simplify right side
    1,854.97x = 3,363,696.88
  5. Step 5: Solve for x
    x = 3,363,696.88/1,854.97
  6. Step 6: Final answer
    x = 1,813.34

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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.