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Finding the Fourth Proportional to 403,928.80, 605,893.20 and 193,458.40

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Solution

The fourth proportional to 403,928.80, 605,893.20 and 193,458.40 is: 290,187.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,928.80 : 605,893.20 = 193,458.40 : x
  2. Step 2: Convert to fraction form
    403,928.80/605,893.20 = 193,458.40/x
  3. Step 3: Cross multiply
    403,928.80x = 605,893.20 × 193,458.40
  4. Step 4: Simplify right side
    403,928.80x = 117,215,129,042.88
  5. Step 5: Solve for x
    x = 117,215,129,042.88/403,928.80
  6. Step 6: Final answer
    x = 290,187.60

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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.