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Finding the Fourth Proportional to 303.62, 419.20 and 191.64

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Solution

The fourth proportional to 303.62, 419.20 and 191.64 is: 264.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.62 : 419.20 = 191.64 : x
  2. Step 2: Convert to fraction form
    303.62/419.20 = 191.64/x
  3. Step 3: Cross multiply
    303.62x = 419.20 × 191.64
  4. Step 4: Simplify right side
    303.62x = 80,335.49
  5. Step 5: Solve for x
    x = 80,335.49/303.62
  6. Step 6: Final answer
    x = 264.59

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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.