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Finding the Fourth Proportional to 38.77, 53.75 and 38.03

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Solution

The fourth proportional to 38.77, 53.75 and 38.03 is: 52.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.77 : 53.75 = 38.03 : x
  2. Step 2: Convert to fraction form
    38.77/53.75 = 38.03/x
  3. Step 3: Cross multiply
    38.77x = 53.75 × 38.03
  4. Step 4: Simplify right side
    38.77x = 2,043.94
  5. Step 5: Solve for x
    x = 2,043.94/38.77
  6. Step 6: Final answer
    x = 52.72

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.