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Finding the Fourth Proportional to 638,143.54, 880,626.74 and 347,757.70

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Solution

The fourth proportional to 638,143.54, 880,626.74 and 347,757.70 is: 479,899.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,143.54 : 880,626.74 = 347,757.70 : x
  2. Step 2: Convert to fraction form
    638,143.54/880,626.74 = 347,757.70/x
  3. Step 3: Cross multiply
    638,143.54x = 880,626.74 × 347,757.70
  4. Step 4: Simplify right side
    638,143.54x = 306,244,729,660.90
  5. Step 5: Solve for x
    x = 306,244,729,660.90/638,143.54
  6. Step 6: Final answer
    x = 479,899.44

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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.