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Finding the Fourth Proportional to 354.38, 531.59 and 107.57

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Solution

The fourth proportional to 354.38, 531.59 and 107.57 is: 161.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.38 : 531.59 = 107.57 : x
  2. Step 2: Convert to fraction form
    354.38/531.59 = 107.57/x
  3. Step 3: Cross multiply
    354.38x = 531.59 × 107.57
  4. Step 4: Simplify right side
    354.38x = 57,182.60
  5. Step 5: Solve for x
    x = 57,182.60/354.38
  6. Step 6: Final answer
    x = 161.36

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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.