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Finding the Fourth Proportional to 307.62, 427.41 and 303.75

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Solution

The fourth proportional to 307.62, 427.41 and 303.75 is: 422.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.62 : 427.41 = 303.75 : x
  2. Step 2: Convert to fraction form
    307.62/427.41 = 303.75/x
  3. Step 3: Cross multiply
    307.62x = 427.41 × 303.75
  4. Step 4: Simplify right side
    307.62x = 129,825.79
  5. Step 5: Solve for x
    x = 129,825.79/307.62
  6. Step 6: Final answer
    x = 422.03

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.