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Finding the Fourth Proportional to 681,436.25, 940,401.47 and 379,649.69

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Solution

The fourth proportional to 681,436.25, 940,401.47 and 379,649.69 is: 523,927.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,436.25 : 940,401.47 = 379,649.69 : x
  2. Step 2: Convert to fraction form
    681,436.25/940,401.47 = 379,649.69/x
  3. Step 3: Cross multiply
    681,436.25x = 940,401.47 × 379,649.69
  4. Step 4: Simplify right side
    681,436.25x = 357,023,126,561.04
  5. Step 5: Solve for x
    x = 357,023,126,561.04/681,436.25
  6. Step 6: Final answer
    x = 523,927.41

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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.