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Finding the Fourth Proportional to 553,910.40, 830,865.60 and 198,979.20

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Solution

The fourth proportional to 553,910.40, 830,865.60 and 198,979.20 is: 298,468.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,910.40 : 830,865.60 = 198,979.20 : x
  2. Step 2: Convert to fraction form
    553,910.40/830,865.60 = 198,979.20/x
  3. Step 3: Cross multiply
    553,910.40x = 830,865.60 × 198,979.20
  4. Step 4: Simplify right side
    553,910.40x = 165,324,972,395.52
  5. Step 5: Solve for x
    x = 165,324,972,395.52/553,910.40
  6. Step 6: Final answer
    x = 298,468.80

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Similar ratio
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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.