Home / 728,239.90-1,004,974.96-405,947.38

Finding the Fourth Proportional to 728,239.90, 1,004,974.96 and 405,947.38

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Solution

The fourth proportional to 728,239.90, 1,004,974.96 and 405,947.38 is: 560,209.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,239.90 : 1,004,974.96 = 405,947.38 : x
  2. Step 2: Convert to fraction form
    728,239.90/1,004,974.96 = 405,947.38/x
  3. Step 3: Cross multiply
    728,239.90x = 1,004,974.96 × 405,947.38
  4. Step 4: Simplify right side
    728,239.90x = 407,966,951,977.61
  5. Step 5: Solve for x
    x = 407,966,951,977.61/728,239.90
  6. Step 6: Final answer
    x = 560,209.56

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1.5x scale

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.