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Finding the Fourth Proportional to 320.95, 480.21 and 191.02

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Solution

The fourth proportional to 320.95, 480.21 and 191.02 is: 285.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.95 : 480.21 = 191.02 : x
  2. Step 2: Convert to fraction form
    320.95/480.21 = 191.02/x
  3. Step 3: Cross multiply
    320.95x = 480.21 × 191.02
  4. Step 4: Simplify right side
    320.95x = 91,729.71
  5. Step 5: Solve for x
    x = 91,729.71/320.95
  6. Step 6: Final answer
    x = 285.81

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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.