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Finding the Fourth Proportional to 480.50, 721.61 and 249.55

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Solution

The fourth proportional to 480.50, 721.61 and 249.55 is: 374.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.50 : 721.61 = 249.55 : x
  2. Step 2: Convert to fraction form
    480.50/721.61 = 249.55/x
  3. Step 3: Cross multiply
    480.50x = 721.61 × 249.55
  4. Step 4: Simplify right side
    480.50x = 180,076.60
  5. Step 5: Solve for x
    x = 180,076.60/480.50
  6. Step 6: Final answer
    x = 374.77

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1.5x scale

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.