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Finding the Third Proportional to 679,981.50 and 920,121.75

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Solution

The third proportional to 679,981.50 and 920,121.75 is: 1,245,069.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,981.50 : 920,121.75 = 920,121.75 : x
  2. Step 2: Convert to fraction form
    679,981.50/920,121.75 = 920,121.75/x
  3. Step 3: Cross multiply
    679,981.50x = 920,121.75 × 920,121.75
  4. Step 4: Simplify right side
    679,981.50x = 846,624,034,823.06
  5. Step 5: Solve for x
    x = 846,624,034,823.06/679,981.50
  6. Step 6: Final answer
    x = 1,245,069.22

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.