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Finding the Fourth Proportional to 52.78, 79.47 and 50.88

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Solution

The fourth proportional to 52.78, 79.47 and 50.88 is: 76.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.78 : 79.47 = 50.88 : x
  2. Step 2: Convert to fraction form
    52.78/79.47 = 50.88/x
  3. Step 3: Cross multiply
    52.78x = 79.47 × 50.88
  4. Step 4: Simplify right side
    52.78x = 4,043.43
  5. Step 5: Solve for x
    x = 4,043.43/52.78
  6. Step 6: Final answer
    x = 76.61

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.