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Finding the Fourth Proportional to 3,191.66, 4,403.85 and 1,865.11

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Solution

The fourth proportional to 3,191.66, 4,403.85 and 1,865.11 is: 2,573.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,191.66 : 4,403.85 = 1,865.11 : x
  2. Step 2: Convert to fraction form
    3,191.66/4,403.85 = 1,865.11/x
  3. Step 3: Cross multiply
    3,191.66x = 4,403.85 × 1,865.11
  4. Step 4: Simplify right side
    3,191.66x = 8,213,667.31
  5. Step 5: Solve for x
    x = 8,213,667.31/3,191.66
  6. Step 6: Final answer
    x = 2,573.47

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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.