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Finding the Fourth Proportional to 517.46, 714.08 and 281.39

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Solution

The fourth proportional to 517.46, 714.08 and 281.39 is: 388.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.46 : 714.08 = 281.39 : x
  2. Step 2: Convert to fraction form
    517.46/714.08 = 281.39/x
  3. Step 3: Cross multiply
    517.46x = 714.08 × 281.39
  4. Step 4: Simplify right side
    517.46x = 200,935.35
  5. Step 5: Solve for x
    x = 200,935.35/517.46
  6. Step 6: Final answer
    x = 388.31

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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.