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Finding the Fourth Proportional to 179.80, 246.83 and 155.20

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Solution

The fourth proportional to 179.80, 246.83 and 155.20 is: 213.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.80 : 246.83 = 155.20 : x
  2. Step 2: Convert to fraction form
    179.80/246.83 = 155.20/x
  3. Step 3: Cross multiply
    179.80x = 246.83 × 155.20
  4. Step 4: Simplify right side
    179.80x = 38,308.02
  5. Step 5: Solve for x
    x = 38,308.02/179.80
  6. Step 6: Final answer
    x = 213.06

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.