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Finding the Fourth Proportional to 519,748.87, 717,245.87 and 290,309.42

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Solution

The fourth proportional to 519,748.87, 717,245.87 and 290,309.42 is: 400,622.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,748.87 : 717,245.87 = 290,309.42 : x
  2. Step 2: Convert to fraction form
    519,748.87/717,245.87 = 290,309.42/x
  3. Step 3: Cross multiply
    519,748.87x = 717,245.87 × 290,309.42
  4. Step 4: Simplify right side
    519,748.87x = 208,223,232,517.10
  5. Step 5: Solve for x
    x = 208,223,232,517.10/519,748.87
  6. Step 6: Final answer
    x = 400,622.77

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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.