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Finding the Fourth Proportional to 39, 58.15 and 36.71

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Solution

The fourth proportional to 39, 58.15 and 36.71 is: 54.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    39 : 58.15 = 36.71 : x
  2. Step 2: Convert to fraction form
    39/58.15 = 36.71/x
  3. Step 3: Cross multiply
    39x = 58.15 × 36.71
  4. Step 4: Simplify right side
    39x = 2,134.69
  5. Step 5: Solve for x
    x = 2,134.69/39
  6. Step 6: Final answer
    x = 54.74

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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.