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Finding the Fourth Proportional to 320.49, 480.80 and 190.59

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Solution

The fourth proportional to 320.49, 480.80 and 190.59 is: 285.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.49 : 480.80 = 190.59 : x
  2. Step 2: Convert to fraction form
    320.49/480.80 = 190.59/x
  3. Step 3: Cross multiply
    320.49x = 480.80 × 190.59
  4. Step 4: Simplify right side
    320.49x = 91,635.67
  5. Step 5: Solve for x
    x = 91,635.67/320.49
  6. Step 6: Final answer
    x = 285.92

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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.