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Finding the Fourth Proportional to 1,964,601.85, 2,947,393.21 and 685,227.71

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Solution

The fourth proportional to 1,964,601.85, 2,947,393.21 and 685,227.71 is: 1,028,012.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,964,601.85 : 2,947,393.21 = 685,227.71 : x
  2. Step 2: Convert to fraction form
    1,964,601.85/2,947,393.21 = 685,227.71/x
  3. Step 3: Cross multiply
    1,964,601.85x = 2,947,393.21 × 685,227.71
  4. Step 4: Simplify right side
    1,964,601.85x = 2,019,635,499,757.85
  5. Step 5: Solve for x
    x = 2,019,635,499,757.85/1,964,601.85
  6. Step 6: Final answer
    x = 1,028,012.62

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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.