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Finding the Fourth Proportional to 40.03, 55.22 and 34.56

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Solution

The fourth proportional to 40.03, 55.22 and 34.56 is: 47.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.03 : 55.22 = 34.56 : x
  2. Step 2: Convert to fraction form
    40.03/55.22 = 34.56/x
  3. Step 3: Cross multiply
    40.03x = 55.22 × 34.56
  4. Step 4: Simplify right side
    40.03x = 1,908.63
  5. Step 5: Solve for x
    x = 1,908.63/40.03
  6. Step 6: Final answer
    x = 47.68

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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.