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Finding the Fourth Proportional to 449.20, 673.02 and 243.31

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Solution

The fourth proportional to 449.20, 673.02 and 243.31 is: 364.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.20 : 673.02 = 243.31 : x
  2. Step 2: Convert to fraction form
    449.20/673.02 = 243.31/x
  3. Step 3: Cross multiply
    449.20x = 673.02 × 243.31
  4. Step 4: Simplify right side
    449.20x = 163,752.50
  5. Step 5: Solve for x
    x = 163,752.50/449.20
  6. Step 6: Final answer
    x = 364.54

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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.