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Finding the Fourth Proportional to 2,191.64, 3,284.67 and 958.73

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Solution

The fourth proportional to 2,191.64, 3,284.67 and 958.73 is: 1,436.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.64 : 3,284.67 = 958.73 : x
  2. Step 2: Convert to fraction form
    2,191.64/3,284.67 = 958.73/x
  3. Step 3: Cross multiply
    2,191.64x = 3,284.67 × 958.73
  4. Step 4: Simplify right side
    2,191.64x = 3,149,095.25
  5. Step 5: Solve for x
    x = 3,149,095.25/2,191.64
  6. Step 6: Final answer
    x = 1,436.87

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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.