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Finding the Fourth Proportional to 43.99, 65.99 and 19.94

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Solution

The fourth proportional to 43.99, 65.99 and 19.94 is: 29.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.99 : 65.99 = 19.94 : x
  2. Step 2: Convert to fraction form
    43.99/65.99 = 19.94/x
  3. Step 3: Cross multiply
    43.99x = 65.99 × 19.94
  4. Step 4: Simplify right side
    43.99x = 1,315.84
  5. Step 5: Solve for x
    x = 1,315.84/43.99
  6. Step 6: Final answer
    x = 29.91

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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.