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Finding the Fourth Proportional to 43.74, 65.34 and 43.56

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Solution

The fourth proportional to 43.74, 65.34 and 43.56 is: 65.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.74 : 65.34 = 43.56 : x
  2. Step 2: Convert to fraction form
    43.74/65.34 = 43.56/x
  3. Step 3: Cross multiply
    43.74x = 65.34 × 43.56
  4. Step 4: Simplify right side
    43.74x = 2,846.21
  5. Step 5: Solve for x
    x = 2,846.21/43.74
  6. Step 6: Final answer
    x = 65.07

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.