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Finding the Fourth Proportional to 229.48, 315.75 and 198.30

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Solution

The fourth proportional to 229.48, 315.75 and 198.30 is: 272.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.48 : 315.75 = 198.30 : x
  2. Step 2: Convert to fraction form
    229.48/315.75 = 198.30/x
  3. Step 3: Cross multiply
    229.48x = 315.75 × 198.30
  4. Step 4: Simplify right side
    229.48x = 62,612.26
  5. Step 5: Solve for x
    x = 62,612.26/229.48
  6. Step 6: Final answer
    x = 272.84

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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.