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Finding the Fourth Proportional to 1,645.98, 2,469 and 671.48

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Solution

The fourth proportional to 1,645.98, 2,469 and 671.48 is: 1,007.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.98 : 2,469 = 671.48 : x
  2. Step 2: Convert to fraction form
    1,645.98/2,469 = 671.48/x
  3. Step 3: Cross multiply
    1,645.98x = 2,469 × 671.48
  4. Step 4: Simplify right side
    1,645.98x = 1,657,871.78
  5. Step 5: Solve for x
    x = 1,657,871.78/1,645.98
  6. Step 6: Final answer
    x = 1,007.22

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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.