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Finding the Fourth Proportional to 43.35, 64.97 and 18.97

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Solution

The fourth proportional to 43.35, 64.97 and 18.97 is: 28.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.35 : 64.97 = 18.97 : x
  2. Step 2: Convert to fraction form
    43.35/64.97 = 18.97/x
  3. Step 3: Cross multiply
    43.35x = 64.97 × 18.97
  4. Step 4: Simplify right side
    43.35x = 1,232.48
  5. Step 5: Solve for x
    x = 1,232.48/43.35
  6. Step 6: Final answer
    x = 28.43

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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.