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Finding the Fourth Proportional to 320.29, 480.11 and 137.63

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Solution

The fourth proportional to 320.29, 480.11 and 137.63 is: 206.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.29 : 480.11 = 137.63 : x
  2. Step 2: Convert to fraction form
    320.29/480.11 = 137.63/x
  3. Step 3: Cross multiply
    320.29x = 480.11 × 137.63
  4. Step 4: Simplify right side
    320.29x = 66,078.05
  5. Step 5: Solve for x
    x = 66,078.05/320.29
  6. Step 6: Final answer
    x = 206.31

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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.