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Finding the Fourth Proportional to 320.76, 480.84 and 239.52

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Solution

The fourth proportional to 320.76, 480.84 and 239.52 is: 359.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.76 : 480.84 = 239.52 : x
  2. Step 2: Convert to fraction form
    320.76/480.84 = 239.52/x
  3. Step 3: Cross multiply
    320.76x = 480.84 × 239.52
  4. Step 4: Simplify right side
    320.76x = 115,170.80
  5. Step 5: Solve for x
    x = 115,170.80/320.76
  6. Step 6: Final answer
    x = 359.06

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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.