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Finding the Fourth Proportional to 638,153.40, 880,640.32 and 347,767.52

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Solution

The fourth proportional to 638,153.40, 880,640.32 and 347,767.52 is: 479,912.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,153.40 : 880,640.32 = 347,767.52 : x
  2. Step 2: Convert to fraction form
    638,153.40/880,640.32 = 347,767.52/x
  3. Step 3: Cross multiply
    638,153.40x = 880,640.32 × 347,767.52
  4. Step 4: Simplify right side
    638,153.40x = 306,258,100,098.41
  5. Step 5: Solve for x
    x = 306,258,100,098.41/638,153.40
  6. Step 6: Final answer
    x = 479,912.98

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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.