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Finding the Fourth Proportional to 724.24, 1,091.74 and 682.48

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Solution

The fourth proportional to 724.24, 1,091.74 and 682.48 is: 1,028.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.24 : 1,091.74 = 682.48 : x
  2. Step 2: Convert to fraction form
    724.24/1,091.74 = 682.48/x
  3. Step 3: Cross multiply
    724.24x = 1,091.74 × 682.48
  4. Step 4: Simplify right side
    724.24x = 745,090.72
  5. Step 5: Solve for x
    x = 745,090.72/724.24
  6. Step 6: Final answer
    x = 1,028.79

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.