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Finding the Fourth Proportional to 831.73, 1,247.93 and 344.67

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Solution

The fourth proportional to 831.73, 1,247.93 and 344.67 is: 517.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.73 : 1,247.93 = 344.67 : x
  2. Step 2: Convert to fraction form
    831.73/1,247.93 = 344.67/x
  3. Step 3: Cross multiply
    831.73x = 1,247.93 × 344.67
  4. Step 4: Simplify right side
    831.73x = 430,124.03
  5. Step 5: Solve for x
    x = 430,124.03/831.73
  6. Step 6: Final answer
    x = 517.14

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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.