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Finding the Fourth Proportional to 46.09, 63.46 and 38.80

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Solution

The fourth proportional to 46.09, 63.46 and 38.80 is: 53.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.09 : 63.46 = 38.80 : x
  2. Step 2: Convert to fraction form
    46.09/63.46 = 38.80/x
  3. Step 3: Cross multiply
    46.09x = 63.46 × 38.80
  4. Step 4: Simplify right side
    46.09x = 2,462.25
  5. Step 5: Solve for x
    x = 2,462.25/46.09
  6. Step 6: Final answer
    x = 53.42

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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.