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Finding the Fourth Proportional to 449.62, 673.34 and 256.66

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Solution

The fourth proportional to 449.62, 673.34 and 256.66 is: 384.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.62 : 673.34 = 256.66 : x
  2. Step 2: Convert to fraction form
    449.62/673.34 = 256.66/x
  3. Step 3: Cross multiply
    449.62x = 673.34 × 256.66
  4. Step 4: Simplify right side
    449.62x = 172,819.44
  5. Step 5: Solve for x
    x = 172,819.44/449.62
  6. Step 6: Final answer
    x = 384.37

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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.