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Finding the Third Proportional to 780.31 and 1,675.38

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Solution

The third proportional to 780.31 and 1,675.38 is: 3,597.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    780.31 : 1,675.38 = 1,675.38 : x
  2. Step 2: Convert to fraction form
    780.31/1,675.38 = 1,675.38/x
  3. Step 3: Cross multiply
    780.31x = 1,675.38 × 1,675.38
  4. Step 4: Simplify right side
    780.31x = 2,806,881.39
  5. Step 5: Solve for x
    x = 2,806,881.39/780.31
  6. Step 6: Final answer
    x = 3,597.12

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.