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Finding the Fourth Proportional to 403,693.60, 605,540.40 and 394,945.60

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Solution

The fourth proportional to 403,693.60, 605,540.40 and 394,945.60 is: 592,418.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,693.60 : 605,540.40 = 394,945.60 : x
  2. Step 2: Convert to fraction form
    403,693.60/605,540.40 = 394,945.60/x
  3. Step 3: Cross multiply
    403,693.60x = 605,540.40 × 394,945.60
  4. Step 4: Simplify right side
    403,693.60x = 239,155,516,602.24
  5. Step 5: Solve for x
    x = 239,155,516,602.24/403,693.60
  6. Step 6: Final answer
    x = 592,418.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.