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Finding the Fourth Proportional to 204.96, 307.20 and 144

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Solution

The fourth proportional to 204.96, 307.20 and 144 is: 215.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.96 : 307.20 = 144 : x
  2. Step 2: Convert to fraction form
    204.96/307.20 = 144/x
  3. Step 3: Cross multiply
    204.96x = 307.20 × 144
  4. Step 4: Simplify right side
    204.96x = 44,236.80
  5. Step 5: Solve for x
    x = 44,236.80/204.96
  6. Step 6: Final answer
    x = 215.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.