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Finding the Fourth Proportional to 2,135.52, 3,204.15 and 965.20

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Solution

The fourth proportional to 2,135.52, 3,204.15 and 965.20 is: 1,448.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.52 : 3,204.15 = 965.20 : x
  2. Step 2: Convert to fraction form
    2,135.52/3,204.15 = 965.20/x
  3. Step 3: Cross multiply
    2,135.52x = 3,204.15 × 965.20
  4. Step 4: Simplify right side
    2,135.52x = 3,092,645.58
  5. Step 5: Solve for x
    x = 3,092,645.58/2,135.52
  6. Step 6: Final answer
    x = 1,448.20

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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.