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Finding the Fourth Proportional to 365.29, 547.80 and 121.75

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Solution

The fourth proportional to 365.29, 547.80 and 121.75 is: 182.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.29 : 547.80 = 121.75 : x
  2. Step 2: Convert to fraction form
    365.29/547.80 = 121.75/x
  3. Step 3: Cross multiply
    365.29x = 547.80 × 121.75
  4. Step 4: Simplify right side
    365.29x = 66,694.65
  5. Step 5: Solve for x
    x = 66,694.65/365.29
  6. Step 6: Final answer
    x = 182.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.