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Finding the Fourth Proportional to 881.72, 1,324.98 and 831.37

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Solution

The fourth proportional to 881.72, 1,324.98 and 831.37 is: 1,249.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.72 : 1,324.98 = 831.37 : x
  2. Step 2: Convert to fraction form
    881.72/1,324.98 = 831.37/x
  3. Step 3: Cross multiply
    881.72x = 1,324.98 × 831.37
  4. Step 4: Simplify right side
    881.72x = 1,101,548.62
  5. Step 5: Solve for x
    x = 1,101,548.62/881.72
  6. Step 6: Final answer
    x = 1,249.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.