Home / 812,785.72-1,121,707.44-450,243.28

Finding the Fourth Proportional to 812,785.72, 1,121,707.44 and 450,243.28

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Solution

The fourth proportional to 812,785.72, 1,121,707.44 and 450,243.28 is: 621,370.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,785.72 : 1,121,707.44 = 450,243.28 : x
  2. Step 2: Convert to fraction form
    812,785.72/1,121,707.44 = 450,243.28/x
  3. Step 3: Cross multiply
    812,785.72x = 1,121,707.44 × 450,243.28
  4. Step 4: Simplify right side
    812,785.72x = 505,041,236,986.00
  5. Step 5: Solve for x
    x = 505,041,236,986.00/812,785.72
  6. Step 6: Final answer
    x = 621,370.71

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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.