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Finding the Fourth Proportional to 43.40, 64.94 and 33.80

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Solution

The fourth proportional to 43.40, 64.94 and 33.80 is: 50.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.40 : 64.94 = 33.80 : x
  2. Step 2: Convert to fraction form
    43.40/64.94 = 33.80/x
  3. Step 3: Cross multiply
    43.40x = 64.94 × 33.80
  4. Step 4: Simplify right side
    43.40x = 2,194.97
  5. Step 5: Solve for x
    x = 2,194.97/43.40
  6. Step 6: Final answer
    x = 50.58

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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.