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Finding the Fourth Proportional to 38.95, 58.47 and 34.70

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Solution

The fourth proportional to 38.95, 58.47 and 34.70 is: 52.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.95 : 58.47 = 34.70 : x
  2. Step 2: Convert to fraction form
    38.95/58.47 = 34.70/x
  3. Step 3: Cross multiply
    38.95x = 58.47 × 34.70
  4. Step 4: Simplify right side
    38.95x = 2,028.91
  5. Step 5: Solve for x
    x = 2,028.91/38.95
  6. Step 6: Final answer
    x = 52.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.