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Finding the Fourth Proportional to 2,757.29, 4,135.95 and 809.46

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Solution

The fourth proportional to 2,757.29, 4,135.95 and 809.46 is: 1,214.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,757.29 : 4,135.95 = 809.46 : x
  2. Step 2: Convert to fraction form
    2,757.29/4,135.95 = 809.46/x
  3. Step 3: Cross multiply
    2,757.29x = 4,135.95 × 809.46
  4. Step 4: Simplify right side
    2,757.29x = 3,347,886.09
  5. Step 5: Solve for x
    x = 3,347,886.09/2,757.29
  6. Step 6: Final answer
    x = 1,214.20

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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.