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Finding the Fourth Proportional to 320.61, 481.04 and 125.71

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Solution

The fourth proportional to 320.61, 481.04 and 125.71 is: 188.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.61 : 481.04 = 125.71 : x
  2. Step 2: Convert to fraction form
    320.61/481.04 = 125.71/x
  3. Step 3: Cross multiply
    320.61x = 481.04 × 125.71
  4. Step 4: Simplify right side
    320.61x = 60,471.54
  5. Step 5: Solve for x
    x = 60,471.54/320.61
  6. Step 6: Final answer
    x = 188.61

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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.