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Finding the Fourth Proportional to 307, 423.68 and 190.50

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Solution

The fourth proportional to 307, 423.68 and 190.50 is: 262.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    307 : 423.68 = 190.50 : x
  2. Step 2: Convert to fraction form
    307/423.68 = 190.50/x
  3. Step 3: Cross multiply
    307x = 423.68 × 190.50
  4. Step 4: Simplify right side
    307x = 80,711.04
  5. Step 5: Solve for x
    x = 80,711.04/307
  6. Step 6: Final answer
    x = 262.90

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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.