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Finding the Fourth Proportional to 1,906.43, 2,625.48 and 1,638.95

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Solution

The fourth proportional to 1,906.43, 2,625.48 and 1,638.95 is: 2,257.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,906.43 : 2,625.48 = 1,638.95 : x
  2. Step 2: Convert to fraction form
    1,906.43/2,625.48 = 1,638.95/x
  3. Step 3: Cross multiply
    1,906.43x = 2,625.48 × 1,638.95
  4. Step 4: Simplify right side
    1,906.43x = 4,303,017.32
  5. Step 5: Solve for x
    x = 4,303,017.32/1,906.43
  6. Step 6: Final answer
    x = 2,257.11

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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.