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Finding the Fourth Proportional to 2,191.90, 3,286.56 and 730.66

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Solution

The fourth proportional to 2,191.90, 3,286.56 and 730.66 is: 1,095.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.90 : 3,286.56 = 730.66 : x
  2. Step 2: Convert to fraction form
    2,191.90/3,286.56 = 730.66/x
  3. Step 3: Cross multiply
    2,191.90x = 3,286.56 × 730.66
  4. Step 4: Simplify right side
    2,191.90x = 2,401,357.93
  5. Step 5: Solve for x
    x = 2,401,357.93/2,191.90
  6. Step 6: Final answer
    x = 1,095.56

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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.