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Finding the Fourth Proportional to 2,581.99, 3,874.63 and 938.39

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Solution

The fourth proportional to 2,581.99, 3,874.63 and 938.39 is: 1,408.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,581.99 : 3,874.63 = 938.39 : x
  2. Step 2: Convert to fraction form
    2,581.99/3,874.63 = 938.39/x
  3. Step 3: Cross multiply
    2,581.99x = 3,874.63 × 938.39
  4. Step 4: Simplify right side
    2,581.99x = 3,635,892.33
  5. Step 5: Solve for x
    x = 3,635,892.33/2,581.99
  6. Step 6: Final answer
    x = 1,408.18

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1.5x scale

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.