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Finding the Fourth Proportional to 1,645.40, 2,468.38 and 671.48

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Solution

The fourth proportional to 1,645.40, 2,468.38 and 671.48 is: 1,007.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.40 : 2,468.38 = 671.48 : x
  2. Step 2: Convert to fraction form
    1,645.40/2,468.38 = 671.48/x
  3. Step 3: Cross multiply
    1,645.40x = 2,468.38 × 671.48
  4. Step 4: Simplify right side
    1,645.40x = 1,657,467.80
  5. Step 5: Solve for x
    x = 1,657,467.80/1,645.40
  6. Step 6: Final answer
    x = 1,007.33

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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.