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Finding the Fourth Proportional to 43.08, 63.80 and 43

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Solution

The fourth proportional to 43.08, 63.80 and 43 is: 63.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.08 : 63.80 = 43 : x
  2. Step 2: Convert to fraction form
    43.08/63.80 = 43/x
  3. Step 3: Cross multiply
    43.08x = 63.80 × 43
  4. Step 4: Simplify right side
    43.08x = 2,743.40
  5. Step 5: Solve for x
    x = 2,743.40/43.08
  6. Step 6: Final answer
    x = 63.68

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.