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Finding the Fourth Proportional to 162, 221.40 and 154.44

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Solution

The fourth proportional to 162, 221.40 and 154.44 is: 211.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    162 : 221.40 = 154.44 : x
  2. Step 2: Convert to fraction form
    162/221.40 = 154.44/x
  3. Step 3: Cross multiply
    162x = 221.40 × 154.44
  4. Step 4: Simplify right side
    162x = 34,193.02
  5. Step 5: Solve for x
    x = 34,193.02/162
  6. Step 6: Final answer
    x = 211.07

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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.