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Finding the Third Proportional to 831.50 and 1,816

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Solution

The third proportional to 831.50 and 1,816 is: 3,966.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.50 : 1,816 = 1,816 : x
  2. Step 2: Convert to fraction form
    831.50/1,816 = 1,816/x
  3. Step 3: Cross multiply
    831.50x = 1,816 × 1,816
  4. Step 4: Simplify right side
    831.50x = 3,297,856
  5. Step 5: Solve for x
    x = 3,297,856/831.50
  6. Step 6: Final answer
    x = 3,966.15

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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.