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Finding the Fourth Proportional to 360.55, 540.75 and 113.71

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Solution

The fourth proportional to 360.55, 540.75 and 113.71 is: 170.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.55 : 540.75 = 113.71 : x
  2. Step 2: Convert to fraction form
    360.55/540.75 = 113.71/x
  3. Step 3: Cross multiply
    360.55x = 540.75 × 113.71
  4. Step 4: Simplify right side
    360.55x = 61,488.68
  5. Step 5: Solve for x
    x = 61,488.68/360.55
  6. Step 6: Final answer
    x = 170.54

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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.