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Finding the Fourth Proportional to 43.68, 65.43 and 19.56

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Solution

The fourth proportional to 43.68, 65.43 and 19.56 is: 29.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.68 : 65.43 = 19.56 : x
  2. Step 2: Convert to fraction form
    43.68/65.43 = 19.56/x
  3. Step 3: Cross multiply
    43.68x = 65.43 × 19.56
  4. Step 4: Simplify right side
    43.68x = 1,279.81
  5. Step 5: Solve for x
    x = 1,279.81/43.68
  6. Step 6: Final answer
    x = 29.30

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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.