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Finding the Fourth Proportional to 353.50, 530.45 and 161.13

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Solution

The fourth proportional to 353.50, 530.45 and 161.13 is: 241.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.50 : 530.45 = 161.13 : x
  2. Step 2: Convert to fraction form
    353.50/530.45 = 161.13/x
  3. Step 3: Cross multiply
    353.50x = 530.45 × 161.13
  4. Step 4: Simplify right side
    353.50x = 85,471.41
  5. Step 5: Solve for x
    x = 85,471.41/353.50
  6. Step 6: Final answer
    x = 241.79

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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.