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Finding the Fourth Proportional to 638,889.85, 957,520.72 and 339,513.85

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Solution

The fourth proportional to 638,889.85, 957,520.72 and 339,513.85 is: 508,838.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,889.85 : 957,520.72 = 339,513.85 : x
  2. Step 2: Convert to fraction form
    638,889.85/957,520.72 = 339,513.85/x
  3. Step 3: Cross multiply
    638,889.85x = 957,520.72 × 339,513.85
  4. Step 4: Simplify right side
    638,889.85x = 325,091,546,101.97
  5. Step 5: Solve for x
    x = 325,091,546,101.97/638,889.85
  6. Step 6: Final answer
    x = 508,838.18

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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.