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Finding the Third Proportional to 780.25 and 1,484

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Solution

The third proportional to 780.25 and 1,484 is: 2,822.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    780.25 : 1,484 = 1,484 : x
  2. Step 2: Convert to fraction form
    780.25/1,484 = 1,484/x
  3. Step 3: Cross multiply
    780.25x = 1,484 × 1,484
  4. Step 4: Simplify right side
    780.25x = 2,202,256
  5. Step 5: Solve for x
    x = 2,202,256/780.25
  6. Step 6: Final answer
    x = 2,822.50

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Why These Related Problems?

These problems maintain the same ratio (1.90) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.