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Finding the Fourth Proportional to 1,273.69, 1,912.16 and 1,082.53

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Solution

The fourth proportional to 1,273.69, 1,912.16 and 1,082.53 is: 1,625.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.69 : 1,912.16 = 1,082.53 : x
  2. Step 2: Convert to fraction form
    1,273.69/1,912.16 = 1,082.53/x
  3. Step 3: Cross multiply
    1,273.69x = 1,912.16 × 1,082.53
  4. Step 4: Simplify right side
    1,273.69x = 2,069,970.56
  5. Step 5: Solve for x
    x = 2,069,970.56/1,273.69
  6. Step 6: Final answer
    x = 1,625.18

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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.