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Finding the Fourth Proportional to 347.58, 479.61 and 198.20

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Solution

The fourth proportional to 347.58, 479.61 and 198.20 is: 273.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.58 : 479.61 = 198.20 : x
  2. Step 2: Convert to fraction form
    347.58/479.61 = 198.20/x
  3. Step 3: Cross multiply
    347.58x = 479.61 × 198.20
  4. Step 4: Simplify right side
    347.58x = 95,058.70
  5. Step 5: Solve for x
    x = 95,058.70/347.58
  6. Step 6: Final answer
    x = 273.49

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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.