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Finding the Fourth Proportional to 39.70, 59.82 and 33.42

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Solution

The fourth proportional to 39.70, 59.82 and 33.42 is: 50.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.70 : 59.82 = 33.42 : x
  2. Step 2: Convert to fraction form
    39.70/59.82 = 33.42/x
  3. Step 3: Cross multiply
    39.70x = 59.82 × 33.42
  4. Step 4: Simplify right side
    39.70x = 1,999.18
  5. Step 5: Solve for x
    x = 1,999.18/39.70
  6. Step 6: Final answer
    x = 50.36

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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.