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Finding the Fourth Proportional to 419,963.20, 579,546.30 and 238,660.90

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Solution

The fourth proportional to 419,963.20, 579,546.30 and 238,660.90 is: 329,350.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,963.20 : 579,546.30 = 238,660.90 : x
  2. Step 2: Convert to fraction form
    419,963.20/579,546.30 = 238,660.90/x
  3. Step 3: Cross multiply
    419,963.20x = 579,546.30 × 238,660.90
  4. Step 4: Simplify right side
    419,963.20x = 138,315,041,549.67
  5. Step 5: Solve for x
    x = 138,315,041,549.67/419,963.20
  6. Step 6: Final answer
    x = 329,350.38

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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.