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Finding the Third Proportional to 342 and 780.50

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Solution

The third proportional to 342 and 780.50 is: 1,781.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    342 : 780.50 = 780.50 : x
  2. Step 2: Convert to fraction form
    342/780.50 = 780.50/x
  3. Step 3: Cross multiply
    342x = 780.50 × 780.50
  4. Step 4: Simplify right side
    342x = 609,180.25
  5. Step 5: Solve for x
    x = 609,180.25/342
  6. Step 6: Final answer
    x = 1,781.23

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These problems maintain the same ratio (2.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.