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Finding the Fourth Proportional to 50.36, 75.46 and 42.80

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Solution

The fourth proportional to 50.36, 75.46 and 42.80 is: 64.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.36 : 75.46 = 42.80 : x
  2. Step 2: Convert to fraction form
    50.36/75.46 = 42.80/x
  3. Step 3: Cross multiply
    50.36x = 75.46 × 42.80
  4. Step 4: Simplify right side
    50.36x = 3,229.69
  5. Step 5: Solve for x
    x = 3,229.69/50.36
  6. Step 6: Final answer
    x = 64.13

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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.