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Finding the Fourth Proportional to 523,986.40, 785,979.60 and 144,906.40

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Solution

The fourth proportional to 523,986.40, 785,979.60 and 144,906.40 is: 217,359.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    523,986.40 : 785,979.60 = 144,906.40 : x
  2. Step 2: Convert to fraction form
    523,986.40/785,979.60 = 144,906.40/x
  3. Step 3: Cross multiply
    523,986.40x = 785,979.60 × 144,906.40
  4. Step 4: Simplify right side
    523,986.40x = 113,893,474,309.44
  5. Step 5: Solve for x
    x = 113,893,474,309.44/523,986.40
  6. Step 6: Final answer
    x = 217,359.60

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Half scale
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Double scale
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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.