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Finding the Fourth Proportional to 723.36, 1,004.92 and 716.60

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Solution

The fourth proportional to 723.36, 1,004.92 and 716.60 is: 995.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.36 : 1,004.92 = 716.60 : x
  2. Step 2: Convert to fraction form
    723.36/1,004.92 = 716.60/x
  3. Step 3: Cross multiply
    723.36x = 1,004.92 × 716.60
  4. Step 4: Simplify right side
    723.36x = 720,125.67
  5. Step 5: Solve for x
    x = 720,125.67/723.36
  6. Step 6: Final answer
    x = 995.53

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.