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Finding the Fourth Proportional to 449.27, 673.19 and 286.86

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Solution

The fourth proportional to 449.27, 673.19 and 286.86 is: 429.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.27 : 673.19 = 286.86 : x
  2. Step 2: Convert to fraction form
    449.27/673.19 = 286.86/x
  3. Step 3: Cross multiply
    449.27x = 673.19 × 286.86
  4. Step 4: Simplify right side
    449.27x = 193,111.28
  5. Step 5: Solve for x
    x = 193,111.28/449.27
  6. Step 6: Final answer
    x = 429.83

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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.