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Finding the Fourth Proportional to 483.20, 725.28 and 300.80

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Solution

The fourth proportional to 483.20, 725.28 and 300.80 is: 451.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.20 : 725.28 = 300.80 : x
  2. Step 2: Convert to fraction form
    483.20/725.28 = 300.80/x
  3. Step 3: Cross multiply
    483.20x = 725.28 × 300.80
  4. Step 4: Simplify right side
    483.20x = 218,164.22
  5. Step 5: Solve for x
    x = 218,164.22/483.20
  6. Step 6: Final answer
    x = 451.50

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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.