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Finding the Fourth Proportional to 1,863.25, 2,793.80 and 766.31

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Solution

The fourth proportional to 1,863.25, 2,793.80 and 766.31 is: 1,149.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,863.25 : 2,793.80 = 766.31 : x
  2. Step 2: Convert to fraction form
    1,863.25/2,793.80 = 766.31/x
  3. Step 3: Cross multiply
    1,863.25x = 2,793.80 × 766.31
  4. Step 4: Simplify right side
    1,863.25x = 2,140,904.82
  5. Step 5: Solve for x
    x = 2,140,904.82/1,863.25
  6. Step 6: Final answer
    x = 1,149.02

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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.