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Finding the Fourth Proportional to 908.27, 1,252.96 and 708.74

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Solution

The fourth proportional to 908.27, 1,252.96 and 708.74 is: 977.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.27 : 1,252.96 = 708.74 : x
  2. Step 2: Convert to fraction form
    908.27/1,252.96 = 708.74/x
  3. Step 3: Cross multiply
    908.27x = 1,252.96 × 708.74
  4. Step 4: Simplify right side
    908.27x = 888,022.87
  5. Step 5: Solve for x
    x = 888,022.87/908.27
  6. Step 6: Final answer
    x = 977.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.