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Finding the Fourth Proportional to 40.44, 55.86 and 40.18

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Solution

The fourth proportional to 40.44, 55.86 and 40.18 is: 55.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.44 : 55.86 = 40.18 : x
  2. Step 2: Convert to fraction form
    40.44/55.86 = 40.18/x
  3. Step 3: Cross multiply
    40.44x = 55.86 × 40.18
  4. Step 4: Simplify right side
    40.44x = 2,244.45
  5. Step 5: Solve for x
    x = 2,244.45/40.44
  6. Step 6: Final answer
    x = 55.50

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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.