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Finding the Fourth Proportional to 638,452.54, 957,678.81 and 217,732.06

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Solution

The fourth proportional to 638,452.54, 957,678.81 and 217,732.06 is: 326,598.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,452.54 : 957,678.81 = 217,732.06 : x
  2. Step 2: Convert to fraction form
    638,452.54/957,678.81 = 217,732.06/x
  3. Step 3: Cross multiply
    638,452.54x = 957,678.81 × 217,732.06
  4. Step 4: Simplify right side
    638,452.54x = 208,517,380,119.65
  5. Step 5: Solve for x
    x = 208,517,380,119.65/638,452.54
  6. Step 6: Final answer
    x = 326,598.09

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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.