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Finding the Fourth Proportional to 2,371.26, 3,556.88 and 639.88

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Solution

The fourth proportional to 2,371.26, 3,556.88 and 639.88 is: 959.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,371.26 : 3,556.88 = 639.88 : x
  2. Step 2: Convert to fraction form
    2,371.26/3,556.88 = 639.88/x
  3. Step 3: Cross multiply
    2,371.26x = 3,556.88 × 639.88
  4. Step 4: Simplify right side
    2,371.26x = 2,275,976.37
  5. Step 5: Solve for x
    x = 2,275,976.37/2,371.26
  6. Step 6: Final answer
    x = 959.82

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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.