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Finding the Fourth Proportional to 816.04, 1,221.96 and 449.92

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Solution

The fourth proportional to 816.04, 1,221.96 and 449.92 is: 673.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.04 : 1,221.96 = 449.92 : x
  2. Step 2: Convert to fraction form
    816.04/1,221.96 = 449.92/x
  3. Step 3: Cross multiply
    816.04x = 1,221.96 × 449.92
  4. Step 4: Simplify right side
    816.04x = 549,778.13
  5. Step 5: Solve for x
    x = 549,778.13/816.04
  6. Step 6: Final answer
    x = 673.72

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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.