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Finding the Fourth Proportional to 243.15, 335.66 and 144.95

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Solution

The fourth proportional to 243.15, 335.66 and 144.95 is: 200.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.15 : 335.66 = 144.95 : x
  2. Step 2: Convert to fraction form
    243.15/335.66 = 144.95/x
  3. Step 3: Cross multiply
    243.15x = 335.66 × 144.95
  4. Step 4: Simplify right side
    243.15x = 48,651.51
  5. Step 5: Solve for x
    x = 48,651.51/243.15
  6. Step 6: Final answer
    x = 200.09

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.