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Finding the Third Proportional to 831.80 and 1,280.04

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Solution

The third proportional to 831.80 and 1,280.04 is: 1,969.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.80 : 1,280.04 = 1,280.04 : x
  2. Step 2: Convert to fraction form
    831.80/1,280.04 = 1,280.04/x
  3. Step 3: Cross multiply
    831.80x = 1,280.04 × 1,280.04
  4. Step 4: Simplify right side
    831.80x = 1,638,500.00
  5. Step 5: Solve for x
    x = 1,638,500.00/831.80
  6. Step 6: Final answer
    x = 1,969.83

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.