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Finding the Fourth Proportional to 638,168.40, 957,252.60 and 217,342.80

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Solution

The fourth proportional to 638,168.40, 957,252.60 and 217,342.80 is: 326,014.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,168.40 : 957,252.60 = 217,342.80 : x
  2. Step 2: Convert to fraction form
    638,168.40/957,252.60 = 217,342.80/x
  3. Step 3: Cross multiply
    638,168.40x = 957,252.60 × 217,342.80
  4. Step 4: Simplify right side
    638,168.40x = 208,051,960,391.28
  5. Step 5: Solve for x
    x = 208,051,960,391.28/638,168.40
  6. Step 6: Final answer
    x = 326,014.20

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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.