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Finding the Fourth Proportional to 39.49, 58.91 and 34.63

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Solution

The fourth proportional to 39.49, 58.91 and 34.63 is: 51.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.49 : 58.91 = 34.63 : x
  2. Step 2: Convert to fraction form
    39.49/58.91 = 34.63/x
  3. Step 3: Cross multiply
    39.49x = 58.91 × 34.63
  4. Step 4: Simplify right side
    39.49x = 2,040.05
  5. Step 5: Solve for x
    x = 2,040.05/39.49
  6. Step 6: Final answer
    x = 51.66

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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.