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Finding the Fourth Proportional to 831.44, 1,246.95 and 344.63

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Solution

The fourth proportional to 831.44, 1,246.95 and 344.63 is: 516.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.44 : 1,246.95 = 344.63 : x
  2. Step 2: Convert to fraction form
    831.44/1,246.95 = 344.63/x
  3. Step 3: Cross multiply
    831.44x = 1,246.95 × 344.63
  4. Step 4: Simplify right side
    831.44x = 429,730.14
  5. Step 5: Solve for x
    x = 429,730.14/831.44
  6. Step 6: Final answer
    x = 516.85

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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.