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Finding the Fourth Proportional to 270.38, 403.71 and 231.80

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Solution

The fourth proportional to 270.38, 403.71 and 231.80 is: 346.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.38 : 403.71 = 231.80 : x
  2. Step 2: Convert to fraction form
    270.38/403.71 = 231.80/x
  3. Step 3: Cross multiply
    270.38x = 403.71 × 231.80
  4. Step 4: Simplify right side
    270.38x = 93,578.82
  5. Step 5: Solve for x
    x = 93,578.82/270.38
  6. Step 6: Final answer
    x = 346.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.