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Finding the Fourth Proportional to 2,491.40, 3,732.90 and 1,969.40

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Solution

The fourth proportional to 2,491.40, 3,732.90 and 1,969.40 is: 2,950.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,491.40 : 3,732.90 = 1,969.40 : x
  2. Step 2: Convert to fraction form
    2,491.40/3,732.90 = 1,969.40/x
  3. Step 3: Cross multiply
    2,491.40x = 3,732.90 × 1,969.40
  4. Step 4: Simplify right side
    2,491.40x = 7,351,573.26
  5. Step 5: Solve for x
    x = 7,351,573.26/2,491.40
  6. Step 6: Final answer
    x = 2,950.78

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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.