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Finding the Fourth Proportional to 480.20, 720.70 and 236.99

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Solution

The fourth proportional to 480.20, 720.70 and 236.99 is: 355.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.20 : 720.70 = 236.99 : x
  2. Step 2: Convert to fraction form
    480.20/720.70 = 236.99/x
  3. Step 3: Cross multiply
    480.20x = 720.70 × 236.99
  4. Step 4: Simplify right side
    480.20x = 170,799.90
  5. Step 5: Solve for x
    x = 170,799.90/480.20
  6. Step 6: Final answer
    x = 355.69

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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.