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Finding the Fourth Proportional to 1,729.20, 2,591.96 and 803.68

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Solution

The fourth proportional to 1,729.20, 2,591.96 and 803.68 is: 1,204.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,729.20 : 2,591.96 = 803.68 : x
  2. Step 2: Convert to fraction form
    1,729.20/2,591.96 = 803.68/x
  3. Step 3: Cross multiply
    1,729.20x = 2,591.96 × 803.68
  4. Step 4: Simplify right side
    1,729.20x = 2,083,106.41
  5. Step 5: Solve for x
    x = 2,083,106.41/1,729.20
  6. Step 6: Final answer
    x = 1,204.66

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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.