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Finding the Fourth Proportional to 1,329.36, 1,834.56 and 831.84

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Solution

The fourth proportional to 1,329.36, 1,834.56 and 831.84 is: 1,147.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.36 : 1,834.56 = 831.84 : x
  2. Step 2: Convert to fraction form
    1,329.36/1,834.56 = 831.84/x
  3. Step 3: Cross multiply
    1,329.36x = 1,834.56 × 831.84
  4. Step 4: Simplify right side
    1,329.36x = 1,526,060.39
  5. Step 5: Solve for x
    x = 1,526,060.39/1,329.36
  6. Step 6: Final answer
    x = 1,147.97

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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.