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Finding the Fourth Proportional to 3,662.31, 5,488.90 and 1,786.66

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Solution

The fourth proportional to 3,662.31, 5,488.90 and 1,786.66 is: 2,677.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,662.31 : 5,488.90 = 1,786.66 : x
  2. Step 2: Convert to fraction form
    3,662.31/5,488.90 = 1,786.66/x
  3. Step 3: Cross multiply
    3,662.31x = 5,488.90 × 1,786.66
  4. Step 4: Simplify right side
    3,662.31x = 9,806,767.28
  5. Step 5: Solve for x
    x = 9,806,767.28/3,662.31
  6. Step 6: Final answer
    x = 2,677.75

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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.