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Finding the Fourth Proportional to 638,145.60, 957,218.40 and 401,949.60

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Solution

The fourth proportional to 638,145.60, 957,218.40 and 401,949.60 is: 602,924.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,145.60 : 957,218.40 = 401,949.60 : x
  2. Step 2: Convert to fraction form
    638,145.60/957,218.40 = 401,949.60/x
  3. Step 3: Cross multiply
    638,145.60x = 957,218.40 × 401,949.60
  4. Step 4: Simplify right side
    638,145.60x = 384,753,552,992.64
  5. Step 5: Solve for x
    x = 384,753,552,992.64/638,145.60
  6. Step 6: Final answer
    x = 602,924.40

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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.