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Finding the Fourth Proportional to 2,845.71, 4,268.22 and 765.90

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Solution

The fourth proportional to 2,845.71, 4,268.22 and 765.90 is: 1,148.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,845.71 : 4,268.22 = 765.90 : x
  2. Step 2: Convert to fraction form
    2,845.71/4,268.22 = 765.90/x
  3. Step 3: Cross multiply
    2,845.71x = 4,268.22 × 765.90
  4. Step 4: Simplify right side
    2,845.71x = 3,269,029.70
  5. Step 5: Solve for x
    x = 3,269,029.70/2,845.71
  6. Step 6: Final answer
    x = 1,148.76

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1.5x scale

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.