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Finding the Fourth Proportional to 3,781.03, 5,674.16 and 1,315.87

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Solution

The fourth proportional to 3,781.03, 5,674.16 and 1,315.87 is: 1,974.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.03 : 5,674.16 = 1,315.87 : x
  2. Step 2: Convert to fraction form
    3,781.03/5,674.16 = 1,315.87/x
  3. Step 3: Cross multiply
    3,781.03x = 5,674.16 × 1,315.87
  4. Step 4: Simplify right side
    3,781.03x = 7,466,450.34
  5. Step 5: Solve for x
    x = 7,466,450.34/3,781.03
  6. Step 6: Final answer
    x = 1,974.71

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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.