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Finding the Fourth Proportional to 40.11, 55.45 and 34.98

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Solution

The fourth proportional to 40.11, 55.45 and 34.98 is: 48.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.11 : 55.45 = 34.98 : x
  2. Step 2: Convert to fraction form
    40.11/55.45 = 34.98/x
  3. Step 3: Cross multiply
    40.11x = 55.45 × 34.98
  4. Step 4: Simplify right side
    40.11x = 1,939.64
  5. Step 5: Solve for x
    x = 1,939.64/40.11
  6. Step 6: Final answer
    x = 48.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.