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Finding the Fourth Proportional to 699.46, 1,049.38 and 212.53

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Solution

The fourth proportional to 699.46, 1,049.38 and 212.53 is: 318.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.46 : 1,049.38 = 212.53 : x
  2. Step 2: Convert to fraction form
    699.46/1,049.38 = 212.53/x
  3. Step 3: Cross multiply
    699.46x = 1,049.38 × 212.53
  4. Step 4: Simplify right side
    699.46x = 223,024.73
  5. Step 5: Solve for x
    x = 223,024.73/699.46
  6. Step 6: Final answer
    x = 318.85

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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.