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Finding the Fourth Proportional to 425.65, 638.20 and 182.11

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Solution

The fourth proportional to 425.65, 638.20 and 182.11 is: 273.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.65 : 638.20 = 182.11 : x
  2. Step 2: Convert to fraction form
    425.65/638.20 = 182.11/x
  3. Step 3: Cross multiply
    425.65x = 638.20 × 182.11
  4. Step 4: Simplify right side
    425.65x = 116,222.60
  5. Step 5: Solve for x
    x = 116,222.60/425.65
  6. Step 6: Final answer
    x = 273.05

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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.