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Finding the Fourth Proportional to 1,331.22, 1,996.65 and 357.33

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Solution

The fourth proportional to 1,331.22, 1,996.65 and 357.33 is: 535.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.22 : 1,996.65 = 357.33 : x
  2. Step 2: Convert to fraction form
    1,331.22/1,996.65 = 357.33/x
  3. Step 3: Cross multiply
    1,331.22x = 1,996.65 × 357.33
  4. Step 4: Simplify right side
    1,331.22x = 713,462.94
  5. Step 5: Solve for x
    x = 713,462.94/1,331.22
  6. Step 6: Final answer
    x = 535.95

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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.