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Finding the Fourth Proportional to 638,141.60, 957,212.40 and 401,945.60

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Solution

The fourth proportional to 638,141.60, 957,212.40 and 401,945.60 is: 602,918.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,141.60 : 957,212.40 = 401,945.60 : x
  2. Step 2: Convert to fraction form
    638,141.60/957,212.40 = 401,945.60/x
  3. Step 3: Cross multiply
    638,141.60x = 957,212.40 × 401,945.60
  4. Step 4: Simplify right side
    638,141.60x = 384,747,312,445.44
  5. Step 5: Solve for x
    x = 384,747,312,445.44/638,141.60
  6. Step 6: Final answer
    x = 602,918.40

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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.