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Finding the Fourth Proportional to 449.96, 674.56 and 312.60

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Solution

The fourth proportional to 449.96, 674.56 and 312.60 is: 468.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.96 : 674.56 = 312.60 : x
  2. Step 2: Convert to fraction form
    449.96/674.56 = 312.60/x
  3. Step 3: Cross multiply
    449.96x = 674.56 × 312.60
  4. Step 4: Simplify right side
    449.96x = 210,867.46
  5. Step 5: Solve for x
    x = 210,867.46/449.96
  6. Step 6: Final answer
    x = 468.64

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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.