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Finding the Fourth Proportional to 61.40, 84.74 and 33.77

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Solution

The fourth proportional to 61.40, 84.74 and 33.77 is: 46.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.40 : 84.74 = 33.77 : x
  2. Step 2: Convert to fraction form
    61.40/84.74 = 33.77/x
  3. Step 3: Cross multiply
    61.40x = 84.74 × 33.77
  4. Step 4: Simplify right side
    61.40x = 2,861.68
  5. Step 5: Solve for x
    x = 2,861.68/61.40
  6. Step 6: Final answer
    x = 46.61

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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.