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Finding the Fourth Proportional to 3,424.65, 5,138.19 and 1,781.16

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Solution

The fourth proportional to 3,424.65, 5,138.19 and 1,781.16 is: 2,672.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,424.65 : 5,138.19 = 1,781.16 : x
  2. Step 2: Convert to fraction form
    3,424.65/5,138.19 = 1,781.16/x
  3. Step 3: Cross multiply
    3,424.65x = 5,138.19 × 1,781.16
  4. Step 4: Simplify right side
    3,424.65x = 9,151,938.50
  5. Step 5: Solve for x
    x = 9,151,938.50/3,424.65
  6. Step 6: Final answer
    x = 2,672.37

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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.