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Finding the Fourth Proportional to 1,805.67, 2,711.16 and 1,115.28

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Solution

The fourth proportional to 1,805.67, 2,711.16 and 1,115.28 is: 1,674.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.67 : 2,711.16 = 1,115.28 : x
  2. Step 2: Convert to fraction form
    1,805.67/2,711.16 = 1,115.28/x
  3. Step 3: Cross multiply
    1,805.67x = 2,711.16 × 1,115.28
  4. Step 4: Simplify right side
    1,805.67x = 3,023,702.52
  5. Step 5: Solve for x
    x = 3,023,702.52/1,805.67
  6. Step 6: Final answer
    x = 1,674.56

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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.