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Finding the Fourth Proportional to 1,248.85, 1,723.37 and 717.37

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Solution

The fourth proportional to 1,248.85, 1,723.37 and 717.37 is: 989.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.85 : 1,723.37 = 717.37 : x
  2. Step 2: Convert to fraction form
    1,248.85/1,723.37 = 717.37/x
  3. Step 3: Cross multiply
    1,248.85x = 1,723.37 × 717.37
  4. Step 4: Simplify right side
    1,248.85x = 1,236,293.94
  5. Step 5: Solve for x
    x = 1,236,293.94/1,248.85
  6. Step 6: Final answer
    x = 989.95

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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.