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Finding the Fourth Proportional to 411,992.20, 618,449.10 and 384,920.20

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Solution

The fourth proportional to 411,992.20, 618,449.10 and 384,920.20 is: 577,810.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,992.20 : 618,449.10 = 384,920.20 : x
  2. Step 2: Convert to fraction form
    411,992.20/618,449.10 = 384,920.20/x
  3. Step 3: Cross multiply
    411,992.20x = 618,449.10 × 384,920.20
  4. Step 4: Simplify right side
    411,992.20x = 238,053,551,261.82
  5. Step 5: Solve for x
    x = 238,053,551,261.82/411,992.20
  6. Step 6: Final answer
    x = 577,810.82

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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.