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Finding the Fourth Proportional to 339.21, 468.12 and 191.87

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Solution

The fourth proportional to 339.21, 468.12 and 191.87 is: 264.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.21 : 468.12 = 191.87 : x
  2. Step 2: Convert to fraction form
    339.21/468.12 = 191.87/x
  3. Step 3: Cross multiply
    339.21x = 468.12 × 191.87
  4. Step 4: Simplify right side
    339.21x = 89,818.18
  5. Step 5: Solve for x
    x = 89,818.18/339.21
  6. Step 6: Final answer
    x = 264.79

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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.