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Finding the Fourth Proportional to 2,375.22, 3,559.19 and 987.39

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Solution

The fourth proportional to 2,375.22, 3,559.19 and 987.39 is: 1,479.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,375.22 : 3,559.19 = 987.39 : x
  2. Step 2: Convert to fraction form
    2,375.22/3,559.19 = 987.39/x
  3. Step 3: Cross multiply
    2,375.22x = 3,559.19 × 987.39
  4. Step 4: Simplify right side
    2,375.22x = 3,514,309.23
  5. Step 5: Solve for x
    x = 3,514,309.23/2,375.22
  6. Step 6: Final answer
    x = 1,479.57

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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.