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Finding the Fourth Proportional to 404,414.20, 606,621.30 and 399,165.40

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Solution

The fourth proportional to 404,414.20, 606,621.30 and 399,165.40 is: 598,748.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,414.20 : 606,621.30 = 399,165.40 : x
  2. Step 2: Convert to fraction form
    404,414.20/606,621.30 = 399,165.40/x
  3. Step 3: Cross multiply
    404,414.20x = 606,621.30 × 399,165.40
  4. Step 4: Simplify right side
    404,414.20x = 242,142,233,863.02
  5. Step 5: Solve for x
    x = 242,142,233,863.02/404,414.20
  6. Step 6: Final answer
    x = 598,748.10

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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.