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Finding the Fourth Proportional to 319.42, 481.03 and 279.33

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Solution

The fourth proportional to 319.42, 481.03 and 279.33 is: 420.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.42 : 481.03 = 279.33 : x
  2. Step 2: Convert to fraction form
    319.42/481.03 = 279.33/x
  3. Step 3: Cross multiply
    319.42x = 481.03 × 279.33
  4. Step 4: Simplify right side
    319.42x = 134,366.11
  5. Step 5: Solve for x
    x = 134,366.11/319.42
  6. Step 6: Final answer
    x = 420.66

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.