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Finding the Fourth Proportional to 207.22, 285.96 and 148.90

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Solution

The fourth proportional to 207.22, 285.96 and 148.90 is: 205.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.22 : 285.96 = 148.90 : x
  2. Step 2: Convert to fraction form
    207.22/285.96 = 148.90/x
  3. Step 3: Cross multiply
    207.22x = 285.96 × 148.90
  4. Step 4: Simplify right side
    207.22x = 42,579.44
  5. Step 5: Solve for x
    x = 42,579.44/207.22
  6. Step 6: Final answer
    x = 205.48

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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.