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Finding the Fourth Proportional to 38.70, 57.74 and 35.66

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Solution

The fourth proportional to 38.70, 57.74 and 35.66 is: 53.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.70 : 57.74 = 35.66 : x
  2. Step 2: Convert to fraction form
    38.70/57.74 = 35.66/x
  3. Step 3: Cross multiply
    38.70x = 57.74 × 35.66
  4. Step 4: Simplify right side
    38.70x = 2,058.83
  5. Step 5: Solve for x
    x = 2,058.83/38.70
  6. Step 6: Final answer
    x = 53.21

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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.