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Finding the Fourth Proportional to 831.69, 1,248.17 and 626.67

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Solution

The fourth proportional to 831.69, 1,248.17 and 626.67 is: 940.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.69 : 1,248.17 = 626.67 : x
  2. Step 2: Convert to fraction form
    831.69/1,248.17 = 626.67/x
  3. Step 3: Cross multiply
    831.69x = 1,248.17 × 626.67
  4. Step 4: Simplify right side
    831.69x = 782,187.56
  5. Step 5: Solve for x
    x = 782,187.56/831.69
  6. Step 6: Final answer
    x = 940.48

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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.