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Finding the Fourth Proportional to 325, 489.94 and 320.14

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Solution

The fourth proportional to 325, 489.94 and 320.14 is: 482.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    325 : 489.94 = 320.14 : x
  2. Step 2: Convert to fraction form
    325/489.94 = 320.14/x
  3. Step 3: Cross multiply
    325x = 489.94 × 320.14
  4. Step 4: Simplify right side
    325x = 156,849.39
  5. Step 5: Solve for x
    x = 156,849.39/325
  6. Step 6: Final answer
    x = 482.61

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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.