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Finding the Third Proportional to 831.75 and 1,280.06

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Solution

The third proportional to 831.75 and 1,280.06 is: 1,970.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.75 : 1,280.06 = 1,280.06 : x
  2. Step 2: Convert to fraction form
    831.75/1,280.06 = 1,280.06/x
  3. Step 3: Cross multiply
    831.75x = 1,280.06 × 1,280.06
  4. Step 4: Simplify right side
    831.75x = 1,638,560.00
  5. Step 5: Solve for x
    x = 1,638,560.00/831.75
  6. Step 6: Final answer
    x = 1,970.02

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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.