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Finding the Fourth Proportional to 2,607.86, 3,912.62 and 759.08

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Solution

The fourth proportional to 2,607.86, 3,912.62 and 759.08 is: 1,138.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,607.86 : 3,912.62 = 759.08 : x
  2. Step 2: Convert to fraction form
    2,607.86/3,912.62 = 759.08/x
  3. Step 3: Cross multiply
    2,607.86x = 3,912.62 × 759.08
  4. Step 4: Simplify right side
    2,607.86x = 2,970,001.37
  5. Step 5: Solve for x
    x = 2,970,001.37/2,607.86
  6. Step 6: Final answer
    x = 1,138.87

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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.