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Finding the Fourth Proportional to 50.69, 75.76 and 39.22

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Solution

The fourth proportional to 50.69, 75.76 and 39.22 is: 58.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.69 : 75.76 = 39.22 : x
  2. Step 2: Convert to fraction form
    50.69/75.76 = 39.22/x
  3. Step 3: Cross multiply
    50.69x = 75.76 × 39.22
  4. Step 4: Simplify right side
    50.69x = 2,971.31
  5. Step 5: Solve for x
    x = 2,971.31/50.69
  6. Step 6: Final answer
    x = 58.62

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.