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Finding the Third Proportional to 666,969.75 and 998,620.50

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Solution

The third proportional to 666,969.75 and 998,620.50 is: 1,495,184.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,969.75 : 998,620.50 = 998,620.50 : x
  2. Step 2: Convert to fraction form
    666,969.75/998,620.50 = 998,620.50/x
  3. Step 3: Cross multiply
    666,969.75x = 998,620.50 × 998,620.50
  4. Step 4: Simplify right side
    666,969.75x = 997,242,903,020.25
  5. Step 5: Solve for x
    x = 997,242,903,020.25/666,969.75
  6. Step 6: Final answer
    x = 1,495,184.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.