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Finding the Fourth Proportional to 1,273.62, 1,757.65 and 825.59

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Solution

The fourth proportional to 1,273.62, 1,757.65 and 825.59 is: 1,139.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.62 : 1,757.65 = 825.59 : x
  2. Step 2: Convert to fraction form
    1,273.62/1,757.65 = 825.59/x
  3. Step 3: Cross multiply
    1,273.62x = 1,757.65 × 825.59
  4. Step 4: Simplify right side
    1,273.62x = 1,451,102.14
  5. Step 5: Solve for x
    x = 1,451,102.14/1,273.62
  6. Step 6: Final answer
    x = 1,139.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.