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Finding the Fourth Proportional to 680,909.40, 940,057.38 and 605,239.20

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Solution

The fourth proportional to 680,909.40, 940,057.38 and 605,239.20 is: 835,587.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,909.40 : 940,057.38 = 605,239.20 : x
  2. Step 2: Convert to fraction form
    680,909.40/940,057.38 = 605,239.20/x
  3. Step 3: Cross multiply
    680,909.40x = 940,057.38 × 605,239.20
  4. Step 4: Simplify right side
    680,909.40x = 568,959,576,625.30
  5. Step 5: Solve for x
    x = 568,959,576,625.30/680,909.40
  6. Step 6: Final answer
    x = 835,587.78

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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.