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Finding the Fourth Proportional to 207.15, 285.87 and 144.96

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Solution

The fourth proportional to 207.15, 285.87 and 144.96 is: 200.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.15 : 285.87 = 144.96 : x
  2. Step 2: Convert to fraction form
    207.15/285.87 = 144.96/x
  3. Step 3: Cross multiply
    207.15x = 285.87 × 144.96
  4. Step 4: Simplify right side
    207.15x = 41,439.72
  5. Step 5: Solve for x
    x = 41,439.72/207.15
  6. Step 6: Final answer
    x = 200.05

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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.