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Finding the Fourth Proportional to 519,906.90, 717,445.83 and 290,418.66

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Solution

The fourth proportional to 519,906.90, 717,445.83 and 290,418.66 is: 400,763.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,906.90 : 717,445.83 = 290,418.66 : x
  2. Step 2: Convert to fraction form
    519,906.90/717,445.83 = 290,418.66/x
  3. Step 3: Cross multiply
    519,906.90x = 717,445.83 × 290,418.66
  4. Step 4: Simplify right side
    519,906.90x = 208,359,656,571.19
  5. Step 5: Solve for x
    x = 208,359,656,571.19/519,906.90
  6. Step 6: Final answer
    x = 400,763.40

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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.