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Finding the Fourth Proportional to 48.25, 66.55 and 29.80

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Solution

The fourth proportional to 48.25, 66.55 and 29.80 is: 41.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.25 : 66.55 = 29.80 : x
  2. Step 2: Convert to fraction form
    48.25/66.55 = 29.80/x
  3. Step 3: Cross multiply
    48.25x = 66.55 × 29.80
  4. Step 4: Simplify right side
    48.25x = 1,982.71
  5. Step 5: Solve for x
    x = 1,982.71/48.25
  6. Step 6: Final answer
    x = 41.10

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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.