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Finding the Fourth Proportional to 52.73, 78.55 and 50.79

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Solution

The fourth proportional to 52.73, 78.55 and 50.79 is: 75.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.73 : 78.55 = 50.79 : x
  2. Step 2: Convert to fraction form
    52.73/78.55 = 50.79/x
  3. Step 3: Cross multiply
    52.73x = 78.55 × 50.79
  4. Step 4: Simplify right side
    52.73x = 3,989.43
  5. Step 5: Solve for x
    x = 3,989.43/52.73
  6. Step 6: Final answer
    x = 75.66

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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.