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Finding the Fourth Proportional to 439.44, 657.96 and 310.80

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Solution

The fourth proportional to 439.44, 657.96 and 310.80 is: 465.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.44 : 657.96 = 310.80 : x
  2. Step 2: Convert to fraction form
    439.44/657.96 = 310.80/x
  3. Step 3: Cross multiply
    439.44x = 657.96 × 310.80
  4. Step 4: Simplify right side
    439.44x = 204,493.97
  5. Step 5: Solve for x
    x = 204,493.97/439.44
  6. Step 6: Final answer
    x = 465.35

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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.