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Finding the Fourth Proportional to 45.40, 68.37 and 38.24

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Solution

The fourth proportional to 45.40, 68.37 and 38.24 is: 57.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.40 : 68.37 = 38.24 : x
  2. Step 2: Convert to fraction form
    45.40/68.37 = 38.24/x
  3. Step 3: Cross multiply
    45.40x = 68.37 × 38.24
  4. Step 4: Simplify right side
    45.40x = 2,614.47
  5. Step 5: Solve for x
    x = 2,614.47/45.40
  6. Step 6: Final answer
    x = 57.59

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.