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Finding the Fourth Proportional to 3,979.87, 5,491.79 and 2,301.01

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Solution

The fourth proportional to 3,979.87, 5,491.79 and 2,301.01 is: 3,175.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.87 : 5,491.79 = 2,301.01 : x
  2. Step 2: Convert to fraction form
    3,979.87/5,491.79 = 2,301.01/x
  3. Step 3: Cross multiply
    3,979.87x = 5,491.79 × 2,301.01
  4. Step 4: Simplify right side
    3,979.87x = 12,636,663.71
  5. Step 5: Solve for x
    x = 12,636,663.71/3,979.87
  6. Step 6: Final answer
    x = 3,175.14

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1.5x scale

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.