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Finding the Fourth Proportional to 719,431.89, 992,822.99 and 397,135.05

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Solution

The fourth proportional to 719,431.89, 992,822.99 and 397,135.05 is: 548,050.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,431.89 : 992,822.99 = 397,135.05 : x
  2. Step 2: Convert to fraction form
    719,431.89/992,822.99 = 397,135.05/x
  3. Step 3: Cross multiply
    719,431.89x = 992,822.99 × 397,135.05
  4. Step 4: Simplify right side
    719,431.89x = 394,284,805,789.12
  5. Step 5: Solve for x
    x = 394,284,805,789.12/719,431.89
  6. Step 6: Final answer
    x = 548,050.22

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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.