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Finding the Fourth Proportional to 50.09, 75.12 and 28.40

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Solution

The fourth proportional to 50.09, 75.12 and 28.40 is: 42.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.09 : 75.12 = 28.40 : x
  2. Step 2: Convert to fraction form
    50.09/75.12 = 28.40/x
  3. Step 3: Cross multiply
    50.09x = 75.12 × 28.40
  4. Step 4: Simplify right side
    50.09x = 2,133.03
  5. Step 5: Solve for x
    x = 2,133.03/50.09
  6. Step 6: Final answer
    x = 42.59

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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.