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Finding the Fourth Proportional to 2,191.93, 3,286.80 and 730.57

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Solution

The fourth proportional to 2,191.93, 3,286.80 and 730.57 is: 1,095.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.93 : 3,286.80 = 730.57 : x
  2. Step 2: Convert to fraction form
    2,191.93/3,286.80 = 730.57/x
  3. Step 3: Cross multiply
    2,191.93x = 3,286.80 × 730.57
  4. Step 4: Simplify right side
    2,191.93x = 2,401,237.48
  5. Step 5: Solve for x
    x = 2,401,237.48/2,191.93
  6. Step 6: Final answer
    x = 1,095.49

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Double scale
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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.