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Finding the Fourth Proportional to 2,608.78, 3,909.49 and 1,373.70

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Solution

The fourth proportional to 2,608.78, 3,909.49 and 1,373.70 is: 2,058.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,608.78 : 3,909.49 = 1,373.70 : x
  2. Step 2: Convert to fraction form
    2,608.78/3,909.49 = 1,373.70/x
  3. Step 3: Cross multiply
    2,608.78x = 3,909.49 × 1,373.70
  4. Step 4: Simplify right side
    2,608.78x = 5,370,466.41
  5. Step 5: Solve for x
    x = 5,370,466.41/2,608.78
  6. Step 6: Final answer
    x = 2,058.61

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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.