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Finding the Fourth Proportional to 1,330.41, 1,996.34 and 636.97

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Solution

The fourth proportional to 1,330.41, 1,996.34 and 636.97 is: 955.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.41 : 1,996.34 = 636.97 : x
  2. Step 2: Convert to fraction form
    1,330.41/1,996.34 = 636.97/x
  3. Step 3: Cross multiply
    1,330.41x = 1,996.34 × 636.97
  4. Step 4: Simplify right side
    1,330.41x = 1,271,608.69
  5. Step 5: Solve for x
    x = 1,271,608.69/1,330.41
  6. Step 6: Final answer
    x = 955.80

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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.