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Finding the Fourth Proportional to 2,672.30, 4,007.73 and 1,811.90

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Solution

The fourth proportional to 2,672.30, 4,007.73 and 1,811.90 is: 2,717.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,672.30 : 4,007.73 = 1,811.90 : x
  2. Step 2: Convert to fraction form
    2,672.30/4,007.73 = 1,811.90/x
  3. Step 3: Cross multiply
    2,672.30x = 4,007.73 × 1,811.90
  4. Step 4: Simplify right side
    2,672.30x = 7,261,605.99
  5. Step 5: Solve for x
    x = 7,261,605.99/2,672.30
  6. Step 6: Final answer
    x = 2,717.36

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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.