Home / 728,116.38-1,004,805.26-405,846.90

Finding the Fourth Proportional to 728,116.38, 1,004,805.26 and 405,846.90

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Solution

The fourth proportional to 728,116.38, 1,004,805.26 and 405,846.90 is: 560,071.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,116.38 : 1,004,805.26 = 405,846.90 : x
  2. Step 2: Convert to fraction form
    728,116.38/1,004,805.26 = 405,846.90/x
  3. Step 3: Cross multiply
    728,116.38x = 1,004,805.26 × 405,846.90
  4. Step 4: Simplify right side
    728,116.38x = 407,797,099,874.69
  5. Step 5: Solve for x
    x = 407,797,099,874.69/728,116.38
  6. Step 6: Final answer
    x = 560,071.32

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Double scale
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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.