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Finding the Fourth Proportional to 701.38, 967.95 and 390.86

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Solution

The fourth proportional to 701.38, 967.95 and 390.86 is: 539.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.38 : 967.95 = 390.86 : x
  2. Step 2: Convert to fraction form
    701.38/967.95 = 390.86/x
  3. Step 3: Cross multiply
    701.38x = 967.95 × 390.86
  4. Step 4: Simplify right side
    701.38x = 378,332.94
  5. Step 5: Solve for x
    x = 378,332.94/701.38
  6. Step 6: Final answer
    x = 539.41

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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.