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Finding the Fourth Proportional to 699.88, 1,049.43 and 480.76

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Solution

The fourth proportional to 699.88, 1,049.43 and 480.76 is: 720.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.88 : 1,049.43 = 480.76 : x
  2. Step 2: Convert to fraction form
    699.88/1,049.43 = 480.76/x
  3. Step 3: Cross multiply
    699.88x = 1,049.43 × 480.76
  4. Step 4: Simplify right side
    699.88x = 504,523.97
  5. Step 5: Solve for x
    x = 504,523.97/699.88
  6. Step 6: Final answer
    x = 720.87

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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.