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Finding the Fourth Proportional to 349.25, 483 and 312.35

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Solution

The fourth proportional to 349.25, 483 and 312.35 is: 431.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.25 : 483 = 312.35 : x
  2. Step 2: Convert to fraction form
    349.25/483 = 312.35/x
  3. Step 3: Cross multiply
    349.25x = 483 × 312.35
  4. Step 4: Simplify right side
    349.25x = 150,865.05
  5. Step 5: Solve for x
    x = 150,865.05/349.25
  6. Step 6: Final answer
    x = 431.97

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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.