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Finding the Fourth Proportional to 1,279,354.96, 1,764,769.76 and 826,645.96

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Solution

The fourth proportional to 1,279,354.96, 1,764,769.76 and 826,645.96 is: 1,140,293.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,354.96 : 1,764,769.76 = 826,645.96 : x
  2. Step 2: Convert to fraction form
    1,279,354.96/1,764,769.76 = 826,645.96/x
  3. Step 3: Cross multiply
    1,279,354.96x = 1,764,769.76 × 826,645.96
  4. Step 4: Simplify right side
    1,279,354.96x = 1,458,839,788,022.25
  5. Step 5: Solve for x
    x = 1,458,839,788,022.25/1,279,354.96
  6. Step 6: Final answer
    x = 1,140,293.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.