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Finding the Fourth Proportional to 279.48, 419.52 and 198.48

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Solution

The fourth proportional to 279.48, 419.52 and 198.48 is: 297.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.48 : 419.52 = 198.48 : x
  2. Step 2: Convert to fraction form
    279.48/419.52 = 198.48/x
  3. Step 3: Cross multiply
    279.48x = 419.52 × 198.48
  4. Step 4: Simplify right side
    279.48x = 83,266.33
  5. Step 5: Solve for x
    x = 83,266.33/279.48
  6. Step 6: Final answer
    x = 297.93

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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.