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Finding the Fourth Proportional to 517.89, 714.67 and 281.83

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Solution

The fourth proportional to 517.89, 714.67 and 281.83 is: 388.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.89 : 714.67 = 281.83 : x
  2. Step 2: Convert to fraction form
    517.89/714.67 = 281.83/x
  3. Step 3: Cross multiply
    517.89x = 714.67 × 281.83
  4. Step 4: Simplify right side
    517.89x = 201,415.45
  5. Step 5: Solve for x
    x = 201,415.45/517.89
  6. Step 6: Final answer
    x = 388.92

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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.