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Finding the Fourth Proportional to 517.69, 714.96 and 393.34

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Solution

The fourth proportional to 517.69, 714.96 and 393.34 is: 543.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.69 : 714.96 = 393.34 : x
  2. Step 2: Convert to fraction form
    517.69/714.96 = 393.34/x
  3. Step 3: Cross multiply
    517.69x = 714.96 × 393.34
  4. Step 4: Simplify right side
    517.69x = 281,222.37
  5. Step 5: Solve for x
    x = 281,222.37/517.69
  6. Step 6: Final answer
    x = 543.23

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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.