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Finding the Fourth Proportional to 3,581.43, 5,372.23 and 1,390.65

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Solution

The fourth proportional to 3,581.43, 5,372.23 and 1,390.65 is: 2,086.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,581.43 : 5,372.23 = 1,390.65 : x
  2. Step 2: Convert to fraction form
    3,581.43/5,372.23 = 1,390.65/x
  3. Step 3: Cross multiply
    3,581.43x = 5,372.23 × 1,390.65
  4. Step 4: Simplify right side
    3,581.43x = 7,470,891.65
  5. Step 5: Solve for x
    x = 7,470,891.65/3,581.43
  6. Step 6: Final answer
    x = 2,086.01

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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.