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Finding the Fourth Proportional to 449.15, 673.89 and 189.22

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Solution

The fourth proportional to 449.15, 673.89 and 189.22 is: 283.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.15 : 673.89 = 189.22 : x
  2. Step 2: Convert to fraction form
    449.15/673.89 = 189.22/x
  3. Step 3: Cross multiply
    449.15x = 673.89 × 189.22
  4. Step 4: Simplify right side
    449.15x = 127,512.34
  5. Step 5: Solve for x
    x = 127,512.34/449.15
  6. Step 6: Final answer
    x = 283.89

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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.