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Finding the Third Proportional to 410,978.25 and 644,865.75

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Solution

The third proportional to 410,978.25 and 644,865.75 is: 1,011,858.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,978.25 : 644,865.75 = 644,865.75 : x
  2. Step 2: Convert to fraction form
    410,978.25/644,865.75 = 644,865.75/x
  3. Step 3: Cross multiply
    410,978.25x = 644,865.75 × 644,865.75
  4. Step 4: Simplify right side
    410,978.25x = 415,851,835,523.06
  5. Step 5: Solve for x
    x = 415,851,835,523.06/410,978.25
  6. Step 6: Final answer
    x = 1,011,858.50

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.