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Finding the Fourth Proportional to 38.93, 57.99 and 38.70

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Solution

The fourth proportional to 38.93, 57.99 and 38.70 is: 57.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.93 : 57.99 = 38.70 : x
  2. Step 2: Convert to fraction form
    38.93/57.99 = 38.70/x
  3. Step 3: Cross multiply
    38.93x = 57.99 × 38.70
  4. Step 4: Simplify right side
    38.93x = 2,244.21
  5. Step 5: Solve for x
    x = 2,244.21/38.93
  6. Step 6: Final answer
    x = 57.65

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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.