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Finding the Fourth Proportional to 1,273.40, 1,757.39 and 749.53

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Solution

The fourth proportional to 1,273.40, 1,757.39 and 749.53 is: 1,034.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.40 : 1,757.39 = 749.53 : x
  2. Step 2: Convert to fraction form
    1,273.40/1,757.39 = 749.53/x
  3. Step 3: Cross multiply
    1,273.40x = 1,757.39 × 749.53
  4. Step 4: Simplify right side
    1,273.40x = 1,317,203.99
  5. Step 5: Solve for x
    x = 1,317,203.99/1,273.40
  6. Step 6: Final answer
    x = 1,034.40

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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.