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Finding the Fourth Proportional to 39.28, 58.66 and 33.58

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Solution

The fourth proportional to 39.28, 58.66 and 33.58 is: 50.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.28 : 58.66 = 33.58 : x
  2. Step 2: Convert to fraction form
    39.28/58.66 = 33.58/x
  3. Step 3: Cross multiply
    39.28x = 58.66 × 33.58
  4. Step 4: Simplify right side
    39.28x = 1,969.63
  5. Step 5: Solve for x
    x = 1,969.63/39.28
  6. Step 6: Final answer
    x = 50.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.