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Finding the Fourth Proportional to 347.98, 480.19 and 208.09

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Solution

The fourth proportional to 347.98, 480.19 and 208.09 is: 287.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.98 : 480.19 = 208.09 : x
  2. Step 2: Convert to fraction form
    347.98/480.19 = 208.09/x
  3. Step 3: Cross multiply
    347.98x = 480.19 × 208.09
  4. Step 4: Simplify right side
    347.98x = 99,922.74
  5. Step 5: Solve for x
    x = 99,922.74/347.98
  6. Step 6: Final answer
    x = 287.15

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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.