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Finding the Fourth Proportional to 638,781.30, 957,807.45 and 239,435.10

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Solution

The fourth proportional to 638,781.30, 957,807.45 and 239,435.10 is: 359,016.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,781.30 : 957,807.45 = 239,435.10 : x
  2. Step 2: Convert to fraction form
    638,781.30/957,807.45 = 239,435.10/x
  3. Step 3: Cross multiply
    638,781.30x = 957,807.45 × 239,435.10
  4. Step 4: Simplify right side
    638,781.30x = 229,332,722,571.50
  5. Step 5: Solve for x
    x = 229,332,722,571.50/638,781.30
  6. Step 6: Final answer
    x = 359,016.02

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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.