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Finding the Fourth Proportional to 319.55, 444.03 and 316.20

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Solution

The fourth proportional to 319.55, 444.03 and 316.20 is: 439.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.55 : 444.03 = 316.20 : x
  2. Step 2: Convert to fraction form
    319.55/444.03 = 316.20/x
  3. Step 3: Cross multiply
    319.55x = 444.03 × 316.20
  4. Step 4: Simplify right side
    319.55x = 140,404.54
  5. Step 5: Solve for x
    x = 140,404.54/319.55
  6. Step 6: Final answer
    x = 439.39

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.