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Finding the Fourth Proportional to 681,562.80, 1,021,469.40 and 415,040.40

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Solution

The fourth proportional to 681,562.80, 1,021,469.40 and 415,040.40 is: 622,027.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,562.80 : 1,021,469.40 = 415,040.40 : x
  2. Step 2: Convert to fraction form
    681,562.80/1,021,469.40 = 415,040.40/x
  3. Step 3: Cross multiply
    681,562.80x = 1,021,469.40 × 415,040.40
  4. Step 4: Simplify right side
    681,562.80x = 423,951,068,363.76
  5. Step 5: Solve for x
    x = 423,951,068,363.76/681,562.80
  6. Step 6: Final answer
    x = 622,027.89

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1.5x scale

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.