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Finding the Fourth Proportional to 814.00, 1,221.00 and 197.70

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Solution

The fourth proportional to 814.00, 1,221.00 and 197.70 is: 296.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.00 : 1,221.00 = 197.70 : x
  2. Step 2: Convert to fraction form
    814.00/1,221.00 = 197.70/x
  3. Step 3: Cross multiply
    814.00x = 1,221.00 × 197.70
  4. Step 4: Simplify right side
    814.00x = 241,393.82
  5. Step 5: Solve for x
    x = 241,393.82/814.00
  6. Step 6: Final answer
    x = 296.55

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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.