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Finding the Fourth Proportional to 349.70, 482.31 and 310.39

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Solution

The fourth proportional to 349.70, 482.31 and 310.39 is: 428.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.70 : 482.31 = 310.39 : x
  2. Step 2: Convert to fraction form
    349.70/482.31 = 310.39/x
  3. Step 3: Cross multiply
    349.70x = 482.31 × 310.39
  4. Step 4: Simplify right side
    349.70x = 149,703.00
  5. Step 5: Solve for x
    x = 149,703.00/349.70
  6. Step 6: Final answer
    x = 428.09

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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.