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Finding the Fourth Proportional to 814.01, 1,221.35 and 448.76

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Solution

The fourth proportional to 814.01, 1,221.35 and 448.76 is: 673.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.01 : 1,221.35 = 448.76 : x
  2. Step 2: Convert to fraction form
    814.01/1,221.35 = 448.76/x
  3. Step 3: Cross multiply
    814.01x = 1,221.35 × 448.76
  4. Step 4: Simplify right side
    814.01x = 548,093.84
  5. Step 5: Solve for x
    x = 548,093.84/814.01
  6. Step 6: Final answer
    x = 673.33

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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.