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Finding the Fourth Proportional to 2,679.23, 3,689.73 and 2,621.99

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Solution

The fourth proportional to 2,679.23, 3,689.73 and 2,621.99 is: 3,610.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.23 : 3,689.73 = 2,621.99 : x
  2. Step 2: Convert to fraction form
    2,679.23/3,689.73 = 2,621.99/x
  3. Step 3: Cross multiply
    2,679.23x = 3,689.73 × 2,621.99
  4. Step 4: Simplify right side
    2,679.23x = 9,674,416.71
  5. Step 5: Solve for x
    x = 9,674,416.71/2,679.23
  6. Step 6: Final answer
    x = 3,610.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.