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Finding the Fourth Proportional to 40.20, 60.30 and 16.15

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Solution

The fourth proportional to 40.20, 60.30 and 16.15 is: 24.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.20 : 60.30 = 16.15 : x
  2. Step 2: Convert to fraction form
    40.20/60.30 = 16.15/x
  3. Step 3: Cross multiply
    40.20x = 60.30 × 16.15
  4. Step 4: Simplify right side
    40.20x = 973.85
  5. Step 5: Solve for x
    x = 973.85/40.20
  6. Step 6: Final answer
    x = 24.23

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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.