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Finding the Third Proportional to 680,910 and 989,400

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Solution

The third proportional to 680,910 and 989,400 is: 1,437,653.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,910 : 989,400 = 989,400 : x
  2. Step 2: Convert to fraction form
    680,910/989,400 = 989,400/x
  3. Step 3: Cross multiply
    680,910x = 989,400 × 989,400
  4. Step 4: Simplify right side
    680,910x = 978,912,360,000
  5. Step 5: Solve for x
    x = 978,912,360,000/680,910
  6. Step 6: Final answer
    x = 1,437,653.08

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These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.