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Finding the Fourth Proportional to 306.74, 423.45 and 190.37

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Solution

The fourth proportional to 306.74, 423.45 and 190.37 is: 262.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.74 : 423.45 = 190.37 : x
  2. Step 2: Convert to fraction form
    306.74/423.45 = 190.37/x
  3. Step 3: Cross multiply
    306.74x = 423.45 × 190.37
  4. Step 4: Simplify right side
    306.74x = 80,610.06
  5. Step 5: Solve for x
    x = 80,610.06/306.74
  6. Step 6: Final answer
    x = 262.80

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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.