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Finding the Fourth Proportional to 49.41, 68.31 and 42.57

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Solution

The fourth proportional to 49.41, 68.31 and 42.57 is: 58.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.41 : 68.31 = 42.57 : x
  2. Step 2: Convert to fraction form
    49.41/68.31 = 42.57/x
  3. Step 3: Cross multiply
    49.41x = 68.31 × 42.57
  4. Step 4: Simplify right side
    49.41x = 2,907.96
  5. Step 5: Solve for x
    x = 2,907.96/49.41
  6. Step 6: Final answer
    x = 58.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.