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Finding the Fourth Proportional to 39.58, 54.59 and 25.02

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Solution

The fourth proportional to 39.58, 54.59 and 25.02 is: 34.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.58 : 54.59 = 25.02 : x
  2. Step 2: Convert to fraction form
    39.58/54.59 = 25.02/x
  3. Step 3: Cross multiply
    39.58x = 54.59 × 25.02
  4. Step 4: Simplify right side
    39.58x = 1,365.84
  5. Step 5: Solve for x
    x = 1,365.84/39.58
  6. Step 6: Final answer
    x = 34.51

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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.