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Finding the Fourth Proportional to 38.67, 57.63 and 38.35

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Solution

The fourth proportional to 38.67, 57.63 and 38.35 is: 57.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.67 : 57.63 = 38.35 : x
  2. Step 2: Convert to fraction form
    38.67/57.63 = 38.35/x
  3. Step 3: Cross multiply
    38.67x = 57.63 × 38.35
  4. Step 4: Simplify right side
    38.67x = 2,209.82
  5. Step 5: Solve for x
    x = 2,209.82/38.67
  6. Step 6: Final answer
    x = 57.15

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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.