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Finding the Fourth Proportional to 1,277.55, 1,761.92 and 997.35

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Solution

The fourth proportional to 1,277.55, 1,761.92 and 997.35 is: 1,375.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.55 : 1,761.92 = 997.35 : x
  2. Step 2: Convert to fraction form
    1,277.55/1,761.92 = 997.35/x
  3. Step 3: Cross multiply
    1,277.55x = 1,761.92 × 997.35
  4. Step 4: Simplify right side
    1,277.55x = 1,757,245.93
  5. Step 5: Solve for x
    x = 1,757,245.93/1,277.55
  6. Step 6: Final answer
    x = 1,375.48

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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.