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Finding the Fourth Proportional to 48.41, 66.80 and 30.89

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Solution

The fourth proportional to 48.41, 66.80 and 30.89 is: 42.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.41 : 66.80 = 30.89 : x
  2. Step 2: Convert to fraction form
    48.41/66.80 = 30.89/x
  3. Step 3: Cross multiply
    48.41x = 66.80 × 30.89
  4. Step 4: Simplify right side
    48.41x = 2,062.96
  5. Step 5: Solve for x
    x = 2,062.96/48.41
  6. Step 6: Final answer
    x = 42.62

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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.