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Finding the Fourth Proportional to 638,191.57, 880,704.51 and 347,803.20

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Solution

The fourth proportional to 638,191.57, 880,704.51 and 347,803.20 is: 479,968.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,191.57 : 880,704.51 = 347,803.20 : x
  2. Step 2: Convert to fraction form
    638,191.57/880,704.51 = 347,803.20/x
  3. Step 3: Cross multiply
    638,191.57x = 880,704.51 × 347,803.20
  4. Step 4: Simplify right side
    638,191.57x = 306,311,848,613.44
  5. Step 5: Solve for x
    x = 306,311,848,613.44/638,191.57
  6. Step 6: Final answer
    x = 479,968.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.