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Finding the Fourth Proportional to 480.76, 721.40 and 336.20

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Solution

The fourth proportional to 480.76, 721.40 and 336.20 is: 504.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.76 : 721.40 = 336.20 : x
  2. Step 2: Convert to fraction form
    480.76/721.40 = 336.20/x
  3. Step 3: Cross multiply
    480.76x = 721.40 × 336.20
  4. Step 4: Simplify right side
    480.76x = 242,534.68
  5. Step 5: Solve for x
    x = 242,534.68/480.76
  6. Step 6: Final answer
    x = 504.48

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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.