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Finding the Fourth Proportional to 638,627.78, 957,941.67 and 259,754.64

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Solution

The fourth proportional to 638,627.78, 957,941.67 and 259,754.64 is: 389,631.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,627.78 : 957,941.67 = 259,754.64 : x
  2. Step 2: Convert to fraction form
    638,627.78/957,941.67 = 259,754.64/x
  3. Step 3: Cross multiply
    638,627.78x = 957,941.67 × 259,754.64
  4. Step 4: Simplify right side
    638,627.78x = 248,829,793,631.85
  5. Step 5: Solve for x
    x = 248,829,793,631.85/638,627.78
  6. Step 6: Final answer
    x = 389,631.96

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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.