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Finding the Fourth Proportional to 307.02, 423.28 and 254.37

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Solution

The fourth proportional to 307.02, 423.28 and 254.37 is: 350.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.02 : 423.28 = 254.37 : x
  2. Step 2: Convert to fraction form
    307.02/423.28 = 254.37/x
  3. Step 3: Cross multiply
    307.02x = 423.28 × 254.37
  4. Step 4: Simplify right side
    307.02x = 107,669.73
  5. Step 5: Solve for x
    x = 107,669.73/307.02
  6. Step 6: Final answer
    x = 350.69

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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.