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Finding the Fourth Proportional to 38.18, 52.73 and 30.51

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Solution

The fourth proportional to 38.18, 52.73 and 30.51 is: 42.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.18 : 52.73 = 30.51 : x
  2. Step 2: Convert to fraction form
    38.18/52.73 = 30.51/x
  3. Step 3: Cross multiply
    38.18x = 52.73 × 30.51
  4. Step 4: Simplify right side
    38.18x = 1,609.08
  5. Step 5: Solve for x
    x = 1,609.08/38.18
  6. Step 6: Final answer
    x = 42.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.