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Finding the Fourth Proportional to 831.67, 1,147.70 and 495.52

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Solution

The fourth proportional to 831.67, 1,147.70 and 495.52 is: 683.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.67 : 1,147.70 = 495.52 : x
  2. Step 2: Convert to fraction form
    831.67/1,147.70 = 495.52/x
  3. Step 3: Cross multiply
    831.67x = 1,147.70 × 495.52
  4. Step 4: Simplify right side
    831.67x = 568,706.67
  5. Step 5: Solve for x
    x = 568,706.67/831.67
  6. Step 6: Final answer
    x = 683.81

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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.