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Finding the Fourth Proportional to 1,273.28, 1,757.25 and 742.01

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Solution

The fourth proportional to 1,273.28, 1,757.25 and 742.01 is: 1,024.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.28 : 1,757.25 = 742.01 : x
  2. Step 2: Convert to fraction form
    1,273.28/1,757.25 = 742.01/x
  3. Step 3: Cross multiply
    1,273.28x = 1,757.25 × 742.01
  4. Step 4: Simplify right side
    1,273.28x = 1,303,888.29
  5. Step 5: Solve for x
    x = 1,303,888.29/1,273.28
  6. Step 6: Final answer
    x = 1,024.04

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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.