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Finding the Fourth Proportional to 513.71, 708.45 and 493.73

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Solution

The fourth proportional to 513.71, 708.45 and 493.73 is: 680.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.71 : 708.45 = 493.73 : x
  2. Step 2: Convert to fraction form
    513.71/708.45 = 493.73/x
  3. Step 3: Cross multiply
    513.71x = 708.45 × 493.73
  4. Step 4: Simplify right side
    513.71x = 349,783.02
  5. Step 5: Solve for x
    x = 349,783.02/513.71
  6. Step 6: Final answer
    x = 680.90

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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.