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Finding the Fourth Proportional to 39.79, 54.90 and 23.41

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Solution

The fourth proportional to 39.79, 54.90 and 23.41 is: 32.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.79 : 54.90 = 23.41 : x
  2. Step 2: Convert to fraction form
    39.79/54.90 = 23.41/x
  3. Step 3: Cross multiply
    39.79x = 54.90 × 23.41
  4. Step 4: Simplify right side
    39.79x = 1,285.21
  5. Step 5: Solve for x
    x = 1,285.21/39.79
  6. Step 6: Final answer
    x = 32.30

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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.