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Finding the Fourth Proportional to 40.69, 61.03 and 12.19

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Solution

The fourth proportional to 40.69, 61.03 and 12.19 is: 18.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.69 : 61.03 = 12.19 : x
  2. Step 2: Convert to fraction form
    40.69/61.03 = 12.19/x
  3. Step 3: Cross multiply
    40.69x = 61.03 × 12.19
  4. Step 4: Simplify right side
    40.69x = 743.82
  5. Step 5: Solve for x
    x = 743.82/40.69
  6. Step 6: Final answer
    x = 18.28

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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.