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Finding the Fourth Proportional to 713.27, 1,069.98 and 251.21

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Solution

The fourth proportional to 713.27, 1,069.98 and 251.21 is: 376.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.27 : 1,069.98 = 251.21 : x
  2. Step 2: Convert to fraction form
    713.27/1,069.98 = 251.21/x
  3. Step 3: Cross multiply
    713.27x = 1,069.98 × 251.21
  4. Step 4: Simplify right side
    713.27x = 268,789.68
  5. Step 5: Solve for x
    x = 268,789.68/713.27
  6. Step 6: Final answer
    x = 376.84

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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.