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Finding the Fourth Proportional to 831.23, 1,246.43 and 465.92

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Solution

The fourth proportional to 831.23, 1,246.43 and 465.92 is: 698.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.23 : 1,246.43 = 465.92 : x
  2. Step 2: Convert to fraction form
    831.23/1,246.43 = 465.92/x
  3. Step 3: Cross multiply
    831.23x = 1,246.43 × 465.92
  4. Step 4: Simplify right side
    831.23x = 580,736.67
  5. Step 5: Solve for x
    x = 580,736.67/831.23
  6. Step 6: Final answer
    x = 698.65

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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.