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Finding the Fourth Proportional to 207.73, 285.90 and 158.50

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Solution

The fourth proportional to 207.73, 285.90 and 158.50 is: 218.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.73 : 285.90 = 158.50 : x
  2. Step 2: Convert to fraction form
    207.73/285.90 = 158.50/x
  3. Step 3: Cross multiply
    207.73x = 285.90 × 158.50
  4. Step 4: Simplify right side
    207.73x = 45,315.15
  5. Step 5: Solve for x
    x = 45,315.15/207.73
  6. Step 6: Final answer
    x = 218.14

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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.