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Finding the Fourth Proportional to 360.39, 540.63 and 103.89

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Solution

The fourth proportional to 360.39, 540.63 and 103.89 is: 155.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.39 : 540.63 = 103.89 : x
  2. Step 2: Convert to fraction form
    360.39/540.63 = 103.89/x
  3. Step 3: Cross multiply
    360.39x = 540.63 × 103.89
  4. Step 4: Simplify right side
    360.39x = 56,166.05
  5. Step 5: Solve for x
    x = 56,166.05/360.39
  6. Step 6: Final answer
    x = 155.85

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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.