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Finding the Fourth Proportional to 307.13, 423.83 and 190.69

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Solution

The fourth proportional to 307.13, 423.83 and 190.69 is: 263.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.13 : 423.83 = 190.69 : x
  2. Step 2: Convert to fraction form
    307.13/423.83 = 190.69/x
  3. Step 3: Cross multiply
    307.13x = 423.83 × 190.69
  4. Step 4: Simplify right side
    307.13x = 80,819.56
  5. Step 5: Solve for x
    x = 80,819.56/307.13
  6. Step 6: Final answer
    x = 263.15

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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.