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Finding the Fourth Proportional to 178.80, 245.46 and 154.20

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Solution

The fourth proportional to 178.80, 245.46 and 154.20 is: 211.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.80 : 245.46 = 154.20 : x
  2. Step 2: Convert to fraction form
    178.80/245.46 = 154.20/x
  3. Step 3: Cross multiply
    178.80x = 245.46 × 154.20
  4. Step 4: Simplify right side
    178.80x = 37,849.93
  5. Step 5: Solve for x
    x = 37,849.93/178.80
  6. Step 6: Final answer
    x = 211.69

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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.