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Finding the Fourth Proportional to 57.78, 79.56 and 50.46

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Solution

The fourth proportional to 57.78, 79.56 and 50.46 is: 69.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.78 : 79.56 = 50.46 : x
  2. Step 2: Convert to fraction form
    57.78/79.56 = 50.46/x
  3. Step 3: Cross multiply
    57.78x = 79.56 × 50.46
  4. Step 4: Simplify right side
    57.78x = 4,014.60
  5. Step 5: Solve for x
    x = 4,014.60/57.78
  6. Step 6: Final answer
    x = 69.48

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