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Finding the Fourth Proportional to 3,781.78, 5,669.02 and 2,391.66

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Solution

The fourth proportional to 3,781.78, 5,669.02 and 2,391.66 is: 3,585.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.78 : 5,669.02 = 2,391.66 : x
  2. Step 2: Convert to fraction form
    3,781.78/5,669.02 = 2,391.66/x
  3. Step 3: Cross multiply
    3,781.78x = 5,669.02 × 2,391.66
  4. Step 4: Simplify right side
    3,781.78x = 13,558,368.37
  5. Step 5: Solve for x
    x = 13,558,368.37/3,781.78
  6. Step 6: Final answer
    x = 3,585.18

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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.