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Finding the Fourth Proportional to 1,903.97, 2,854.01 and 1,287.74

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Solution

The fourth proportional to 1,903.97, 2,854.01 and 1,287.74 is: 1,930.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,903.97 : 2,854.01 = 1,287.74 : x
  2. Step 2: Convert to fraction form
    1,903.97/2,854.01 = 1,287.74/x
  3. Step 3: Cross multiply
    1,903.97x = 2,854.01 × 1,287.74
  4. Step 4: Simplify right side
    1,903.97x = 3,675,202.13
  5. Step 5: Solve for x
    x = 3,675,202.13/1,903.97
  6. Step 6: Final answer
    x = 1,930.29

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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.