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Finding the Fourth Proportional to 3,979.65, 5,491.91 and 2,407.29

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Solution

The fourth proportional to 3,979.65, 5,491.91 and 2,407.29 is: 3,322.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.65 : 5,491.91 = 2,407.29 : x
  2. Step 2: Convert to fraction form
    3,979.65/5,491.91 = 2,407.29/x
  3. Step 3: Cross multiply
    3,979.65x = 5,491.91 × 2,407.29
  4. Step 4: Simplify right side
    3,979.65x = 13,220,607.99
  5. Step 5: Solve for x
    x = 13,220,607.99/3,979.65
  6. Step 6: Final answer
    x = 3,322.05

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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.