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Finding the Fourth Proportional to 40.78, 56.56 and 36.73

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Solution

The fourth proportional to 40.78, 56.56 and 36.73 is: 50.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.78 : 56.56 = 36.73 : x
  2. Step 2: Convert to fraction form
    40.78/56.56 = 36.73/x
  3. Step 3: Cross multiply
    40.78x = 56.56 × 36.73
  4. Step 4: Simplify right side
    40.78x = 2,077.22
  5. Step 5: Solve for x
    x = 2,077.22/40.78
  6. Step 6: Final answer
    x = 50.94

Related Problems

Find fourth proportional to 20.39, 28.28 and 18.36
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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.