Home / 784,139.86-1,083,584.01-640,847.62

Finding the Fourth Proportional to 784,139.86, 1,083,584.01 and 640,847.62

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Solution

The fourth proportional to 784,139.86, 1,083,584.01 and 640,847.62 is: 885,571.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    784,139.86 : 1,083,584.01 = 640,847.62 : x
  2. Step 2: Convert to fraction form
    784,139.86/1,083,584.01 = 640,847.62/x
  3. Step 3: Cross multiply
    784,139.86x = 1,083,584.01 × 640,847.62
  4. Step 4: Simplify right side
    784,139.86x = 694,412,233,878.56
  5. Step 5: Solve for x
    x = 694,412,233,878.56/784,139.86
  6. Step 6: Final answer
    x = 885,571.91

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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.