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Finding the Fourth Proportional to 1,371.56, 1,892.76 and 750.56

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Solution

The fourth proportional to 1,371.56, 1,892.76 and 750.56 is: 1,035.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371.56 : 1,892.76 = 750.56 : x
  2. Step 2: Convert to fraction form
    1,371.56/1,892.76 = 750.56/x
  3. Step 3: Cross multiply
    1,371.56x = 1,892.76 × 750.56
  4. Step 4: Simplify right side
    1,371.56x = 1,420,634.68
  5. Step 5: Solve for x
    x = 1,420,634.68/1,371.56
  6. Step 6: Final answer
    x = 1,035.78

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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.