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Finding the Fourth Proportional to 381,591.67, 526,597.55 and 209,520.78

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Solution

The fourth proportional to 381,591.67, 526,597.55 and 209,520.78 is: 289,139.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,591.67 : 526,597.55 = 209,520.78 : x
  2. Step 2: Convert to fraction form
    381,591.67/526,597.55 = 209,520.78/x
  3. Step 3: Cross multiply
    381,591.67x = 526,597.55 × 209,520.78
  4. Step 4: Simplify right side
    381,591.67x = 110,333,129,367.26
  5. Step 5: Solve for x
    x = 110,333,129,367.26/381,591.67
  6. Step 6: Final answer
    x = 289,139.25

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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.