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Finding the Fourth Proportional to 701.39, 967.92 and 390.89

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Solution

The fourth proportional to 701.39, 967.92 and 390.89 is: 539.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.39 : 967.92 = 390.89 : x
  2. Step 2: Convert to fraction form
    701.39/967.92 = 390.89/x
  3. Step 3: Cross multiply
    701.39x = 967.92 × 390.89
  4. Step 4: Simplify right side
    701.39x = 378,350.25
  5. Step 5: Solve for x
    x = 378,350.25/701.39
  6. Step 6: Final answer
    x = 539.43

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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.