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Finding the Fourth Proportional to 681,763.82, 1,022,645.72 and 261,039.68

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Solution

The fourth proportional to 681,763.82, 1,022,645.72 and 261,039.68 is: 391,559.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,763.82 : 1,022,645.72 = 261,039.68 : x
  2. Step 2: Convert to fraction form
    681,763.82/1,022,645.72 = 261,039.68/x
  3. Step 3: Cross multiply
    681,763.82x = 1,022,645.72 × 261,039.68
  4. Step 4: Simplify right side
    681,763.82x = 266,951,111,502.17
  5. Step 5: Solve for x
    x = 266,951,111,502.17/681,763.82
  6. Step 6: Final answer
    x = 391,559.52

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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.