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Finding the Third Proportional to 380.95 and 831.52

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Solution

The third proportional to 380.95 and 831.52 is: 1,814.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.95 : 831.52 = 831.52 : x
  2. Step 2: Convert to fraction form
    380.95/831.52 = 831.52/x
  3. Step 3: Cross multiply
    380.95x = 831.52 × 831.52
  4. Step 4: Simplify right side
    380.95x = 691,418.23
  5. Step 5: Solve for x
    x = 691,418.23/380.95
  6. Step 6: Final answer
    x = 1,814.97

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.