Home / 728,126.72-1,004,819.48-405,857.18

Finding the Fourth Proportional to 728,126.72, 1,004,819.48 and 405,857.18

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Solution

The fourth proportional to 728,126.72, 1,004,819.48 and 405,857.18 is: 560,085.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,126.72 : 1,004,819.48 = 405,857.18 : x
  2. Step 2: Convert to fraction form
    728,126.72/1,004,819.48 = 405,857.18/x
  3. Step 3: Cross multiply
    728,126.72x = 1,004,819.48 × 405,857.18
  4. Step 4: Simplify right side
    728,126.72x = 407,813,202,566.59
  5. Step 5: Solve for x
    x = 407,813,202,566.59/728,126.72
  6. Step 6: Final answer
    x = 560,085.48

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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.