Home / 728,128.57-1,004,800.30-422,259.61

Finding the Fourth Proportional to 728,128.57, 1,004,800.30 and 422,259.61

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Solution

The fourth proportional to 728,128.57, 1,004,800.30 and 422,259.61 is: 582,708.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,128.57 : 1,004,800.30 = 422,259.61 : x
  2. Step 2: Convert to fraction form
    728,128.57/1,004,800.30 = 422,259.61/x
  3. Step 3: Cross multiply
    728,128.57x = 1,004,800.30 × 422,259.61
  4. Step 4: Simplify right side
    728,128.57x = 424,286,582,805.88
  5. Step 5: Solve for x
    x = 424,286,582,805.88/728,128.57
  6. Step 6: Final answer
    x = 582,708.33

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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.