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Finding the Fourth Proportional to 449.60, 674.76 and 385.01

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Solution

The fourth proportional to 449.60, 674.76 and 385.01 is: 577.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.60 : 674.76 = 385.01 : x
  2. Step 2: Convert to fraction form
    449.60/674.76 = 385.01/x
  3. Step 3: Cross multiply
    449.60x = 674.76 × 385.01
  4. Step 4: Simplify right side
    449.60x = 259,789.95
  5. Step 5: Solve for x
    x = 259,789.95/449.60
  6. Step 6: Final answer
    x = 577.83

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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.