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Finding the Fourth Proportional to 303.74, 419.01 and 198.84

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Solution

The fourth proportional to 303.74, 419.01 and 198.84 is: 274.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.74 : 419.01 = 198.84 : x
  2. Step 2: Convert to fraction form
    303.74/419.01 = 198.84/x
  3. Step 3: Cross multiply
    303.74x = 419.01 × 198.84
  4. Step 4: Simplify right side
    303.74x = 83,315.95
  5. Step 5: Solve for x
    x = 83,315.95/303.74
  6. Step 6: Final answer
    x = 274.30

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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.