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Finding the Fourth Proportional to 43.09, 59.47 and 30.85

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Solution

The fourth proportional to 43.09, 59.47 and 30.85 is: 42.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.09 : 59.47 = 30.85 : x
  2. Step 2: Convert to fraction form
    43.09/59.47 = 30.85/x
  3. Step 3: Cross multiply
    43.09x = 59.47 × 30.85
  4. Step 4: Simplify right side
    43.09x = 1,834.42
  5. Step 5: Solve for x
    x = 1,834.42/43.09
  6. Step 6: Final answer
    x = 42.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.