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Finding the Fourth Proportional to 2,191.84, 3,288.76 and 1,369.88

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Solution

The fourth proportional to 2,191.84, 3,288.76 and 1,369.88 is: 2,055.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.84 : 3,288.76 = 1,369.88 : x
  2. Step 2: Convert to fraction form
    2,191.84/3,288.76 = 1,369.88/x
  3. Step 3: Cross multiply
    2,191.84x = 3,288.76 × 1,369.88
  4. Step 4: Simplify right side
    2,191.84x = 4,505,206.55
  5. Step 5: Solve for x
    x = 4,505,206.55/2,191.84
  6. Step 6: Final answer
    x = 2,055.44

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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.