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Finding the Fourth Proportional to 50.15, 75.26 and 21.27

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Solution

The fourth proportional to 50.15, 75.26 and 21.27 is: 31.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.15 : 75.26 = 21.27 : x
  2. Step 2: Convert to fraction form
    50.15/75.26 = 21.27/x
  3. Step 3: Cross multiply
    50.15x = 75.26 × 21.27
  4. Step 4: Simplify right side
    50.15x = 1,600.47
  5. Step 5: Solve for x
    x = 1,600.47/50.15
  6. Step 6: Final answer
    x = 31.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.