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Finding the Fourth Proportional to 52.86, 72.81 and 38.28

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Solution

The fourth proportional to 52.86, 72.81 and 38.28 is: 52.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.86 : 72.81 = 38.28 : x
  2. Step 2: Convert to fraction form
    52.86/72.81 = 38.28/x
  3. Step 3: Cross multiply
    52.86x = 72.81 × 38.28
  4. Step 4: Simplify right side
    52.86x = 2,787.17
  5. Step 5: Solve for x
    x = 2,787.17/52.86
  6. Step 6: Final answer
    x = 52.73

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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.