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Finding the Fourth Proportional to 513.73, 708.78 and 314.47

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Solution

The fourth proportional to 513.73, 708.78 and 314.47 is: 433.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.73 : 708.78 = 314.47 : x
  2. Step 2: Convert to fraction form
    513.73/708.78 = 314.47/x
  3. Step 3: Cross multiply
    513.73x = 708.78 × 314.47
  4. Step 4: Simplify right side
    513.73x = 222,890.05
  5. Step 5: Solve for x
    x = 222,890.05/513.73
  6. Step 6: Final answer
    x = 433.87

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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.