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Finding the Fourth Proportional to 3,625.11, 4,998 and 3,126.78

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Solution

The fourth proportional to 3,625.11, 4,998 and 3,126.78 is: 4,310.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,625.11 : 4,998 = 3,126.78 : x
  2. Step 2: Convert to fraction form
    3,625.11/4,998 = 3,126.78/x
  3. Step 3: Cross multiply
    3,625.11x = 4,998 × 3,126.78
  4. Step 4: Simplify right side
    3,625.11x = 15,627,646.44
  5. Step 5: Solve for x
    x = 15,627,646.44/3,625.11
  6. Step 6: Final answer
    x = 4,310.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.