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Finding the Fourth Proportional to 162.85, 242.96 and 155.12

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Solution

The fourth proportional to 162.85, 242.96 and 155.12 is: 231.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.85 : 242.96 = 155.12 : x
  2. Step 2: Convert to fraction form
    162.85/242.96 = 155.12/x
  3. Step 3: Cross multiply
    162.85x = 242.96 × 155.12
  4. Step 4: Simplify right side
    162.85x = 37,687.96
  5. Step 5: Solve for x
    x = 37,687.96/162.85
  6. Step 6: Final answer
    x = 231.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.