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Finding the Fourth Proportional to 243.18, 335.35 and 208.33

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Solution

The fourth proportional to 243.18, 335.35 and 208.33 is: 287.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.18 : 335.35 = 208.33 : x
  2. Step 2: Convert to fraction form
    243.18/335.35 = 208.33/x
  3. Step 3: Cross multiply
    243.18x = 335.35 × 208.33
  4. Step 4: Simplify right side
    243.18x = 69,862.11
  5. Step 5: Solve for x
    x = 69,862.11/243.18
  6. Step 6: Final answer
    x = 287.29

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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.