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Finding the Fourth Proportional to 291.76, 437.20 and 199

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Solution

The fourth proportional to 291.76, 437.20 and 199 is: 298.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.76 : 437.20 = 199 : x
  2. Step 2: Convert to fraction form
    291.76/437.20 = 199/x
  3. Step 3: Cross multiply
    291.76x = 437.20 × 199
  4. Step 4: Simplify right side
    291.76x = 87,002.80
  5. Step 5: Solve for x
    x = 87,002.80/291.76
  6. Step 6: Final answer
    x = 298.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.