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Finding the Fourth Proportional to 52.88, 78.83 and 48.78

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Solution

The fourth proportional to 52.88, 78.83 and 48.78 is: 72.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.88 : 78.83 = 48.78 : x
  2. Step 2: Convert to fraction form
    52.88/78.83 = 48.78/x
  3. Step 3: Cross multiply
    52.88x = 78.83 × 48.78
  4. Step 4: Simplify right side
    52.88x = 3,845.35
  5. Step 5: Solve for x
    x = 3,845.35/52.88
  6. Step 6: Final answer
    x = 72.71

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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.