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Finding the Fourth Proportional to 279.01, 419.99 and 198.41

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Solution

The fourth proportional to 279.01, 419.99 and 198.41 is: 298.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.01 : 419.99 = 198.41 : x
  2. Step 2: Convert to fraction form
    279.01/419.99 = 198.41/x
  3. Step 3: Cross multiply
    279.01x = 419.99 × 198.41
  4. Step 4: Simplify right side
    279.01x = 83,330.22
  5. Step 5: Solve for x
    x = 83,330.22/279.01
  6. Step 6: Final answer
    x = 298.66

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.