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Finding the Fourth Proportional to 40.10, 55.18 and 38.27

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Solution

The fourth proportional to 40.10, 55.18 and 38.27 is: 52.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.10 : 55.18 = 38.27 : x
  2. Step 2: Convert to fraction form
    40.10/55.18 = 38.27/x
  3. Step 3: Cross multiply
    40.10x = 55.18 × 38.27
  4. Step 4: Simplify right side
    40.10x = 2,111.92
  5. Step 5: Solve for x
    x = 2,111.92/40.10
  6. Step 6: Final answer
    x = 52.67

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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.