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Finding the Fourth Proportional to 347.90, 480.09 and 198.51

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Solution

The fourth proportional to 347.90, 480.09 and 198.51 is: 273.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.90 : 480.09 = 198.51 : x
  2. Step 2: Convert to fraction form
    347.90/480.09 = 198.51/x
  3. Step 3: Cross multiply
    347.90x = 480.09 × 198.51
  4. Step 4: Simplify right side
    347.90x = 95,304.86
  5. Step 5: Solve for x
    x = 95,304.86/347.90
  6. Step 6: Final answer
    x = 273.95

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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.