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Finding the Fourth Proportional to 207.44, 310.58 and 142.30

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Solution

The fourth proportional to 207.44, 310.58 and 142.30 is: 213.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.44 : 310.58 = 142.30 : x
  2. Step 2: Convert to fraction form
    207.44/310.58 = 142.30/x
  3. Step 3: Cross multiply
    207.44x = 310.58 × 142.30
  4. Step 4: Simplify right side
    207.44x = 44,194.05
  5. Step 5: Solve for x
    x = 44,194.05/207.44
  6. Step 6: Final answer
    x = 213.05

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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.