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Finding the Fourth Proportional to 849.54, 1,268.71 and 724.80

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Solution

The fourth proportional to 849.54, 1,268.71 and 724.80 is: 1,082.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.54 : 1,268.71 = 724.80 : x
  2. Step 2: Convert to fraction form
    849.54/1,268.71 = 724.80/x
  3. Step 3: Cross multiply
    849.54x = 1,268.71 × 724.80
  4. Step 4: Simplify right side
    849.54x = 919,561.01
  5. Step 5: Solve for x
    x = 919,561.01/849.54
  6. Step 6: Final answer
    x = 1,082.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.