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Finding the Fourth Proportional to 207.70, 287.01 and 158.92

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Solution

The fourth proportional to 207.70, 287.01 and 158.92 is: 219.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.70 : 287.01 = 158.92 : x
  2. Step 2: Convert to fraction form
    207.70/287.01 = 158.92/x
  3. Step 3: Cross multiply
    207.70x = 287.01 × 158.92
  4. Step 4: Simplify right side
    207.70x = 45,610.91
  5. Step 5: Solve for x
    x = 45,610.91/207.70
  6. Step 6: Final answer
    x = 219.60

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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.