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Finding the Fourth Proportional to 354.44, 531.39 and 161.93

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Solution

The fourth proportional to 354.44, 531.39 and 161.93 is: 242.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.44 : 531.39 = 161.93 : x
  2. Step 2: Convert to fraction form
    354.44/531.39 = 161.93/x
  3. Step 3: Cross multiply
    354.44x = 531.39 × 161.93
  4. Step 4: Simplify right side
    354.44x = 86,047.98
  5. Step 5: Solve for x
    x = 86,047.98/354.44
  6. Step 6: Final answer
    x = 242.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.