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Finding the Fourth Proportional to 45.56, 68.15 and 38.36

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Solution

The fourth proportional to 45.56, 68.15 and 38.36 is: 57.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.56 : 68.15 = 38.36 : x
  2. Step 2: Convert to fraction form
    45.56/68.15 = 38.36/x
  3. Step 3: Cross multiply
    45.56x = 68.15 × 38.36
  4. Step 4: Simplify right side
    45.56x = 2,613.99
  5. Step 5: Solve for x
    x = 2,613.99/45.56
  6. Step 6: Final answer
    x = 57.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.