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Finding the Fourth Proportional to 39.98, 55.19 and 36.59

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Solution

The fourth proportional to 39.98, 55.19 and 36.59 is: 50.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.98 : 55.19 = 36.59 : x
  2. Step 2: Convert to fraction form
    39.98/55.19 = 36.59/x
  3. Step 3: Cross multiply
    39.98x = 55.19 × 36.59
  4. Step 4: Simplify right side
    39.98x = 2,019.22
  5. Step 5: Solve for x
    x = 2,019.22/39.98
  6. Step 6: Final answer
    x = 50.50

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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.