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Finding the Fourth Proportional to 50.48, 75.70 and 18.42

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Solution

The fourth proportional to 50.48, 75.70 and 18.42 is: 27.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.48 : 75.70 = 18.42 : x
  2. Step 2: Convert to fraction form
    50.48/75.70 = 18.42/x
  3. Step 3: Cross multiply
    50.48x = 75.70 × 18.42
  4. Step 4: Simplify right side
    50.48x = 1,394.39
  5. Step 5: Solve for x
    x = 1,394.39/50.48
  6. Step 6: Final answer
    x = 27.62

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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.