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Finding the Fourth Proportional to 360.21, 540.23 and 140.79

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Solution

The fourth proportional to 360.21, 540.23 and 140.79 is: 211.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.21 : 540.23 = 140.79 : x
  2. Step 2: Convert to fraction form
    360.21/540.23 = 140.79/x
  3. Step 3: Cross multiply
    360.21x = 540.23 × 140.79
  4. Step 4: Simplify right side
    360.21x = 76,058.28
  5. Step 5: Solve for x
    x = 76,058.28/360.21
  6. Step 6: Final answer
    x = 211.15

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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.