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Finding the Fourth Proportional to 516.79, 714.51 and 493.84

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Solution

The fourth proportional to 516.79, 714.51 and 493.84 is: 682.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.79 : 714.51 = 493.84 : x
  2. Step 2: Convert to fraction form
    516.79/714.51 = 493.84/x
  3. Step 3: Cross multiply
    516.79x = 714.51 × 493.84
  4. Step 4: Simplify right side
    516.79x = 352,850.05
  5. Step 5: Solve for x
    x = 352,850.05/516.79
  6. Step 6: Final answer
    x = 682.78

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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.