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Finding the Fourth Proportional to 1,682.43, 2,522.46 and 642.49

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Solution

The fourth proportional to 1,682.43, 2,522.46 and 642.49 is: 963.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,682.43 : 2,522.46 = 642.49 : x
  2. Step 2: Convert to fraction form
    1,682.43/2,522.46 = 642.49/x
  3. Step 3: Cross multiply
    1,682.43x = 2,522.46 × 642.49
  4. Step 4: Simplify right side
    1,682.43x = 1,620,655.33
  5. Step 5: Solve for x
    x = 1,620,655.33/1,682.43
  6. Step 6: Final answer
    x = 963.28

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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.