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Finding the Fourth Proportional to 316.83, 437.11 and 198.76

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Solution

The fourth proportional to 316.83, 437.11 and 198.76 is: 274.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.83 : 437.11 = 198.76 : x
  2. Step 2: Convert to fraction form
    316.83/437.11 = 198.76/x
  3. Step 3: Cross multiply
    316.83x = 437.11 × 198.76
  4. Step 4: Simplify right side
    316.83x = 86,877.57
  5. Step 5: Solve for x
    x = 86,877.57/316.83
  6. Step 6: Final answer
    x = 274.21

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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.