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Finding the Fourth Proportional to 350.08, 482.08 and 321.28

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Solution

The fourth proportional to 350.08, 482.08 and 321.28 is: 442.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    350.08 : 482.08 = 321.28 : x
  2. Step 2: Convert to fraction form
    350.08/482.08 = 321.28/x
  3. Step 3: Cross multiply
    350.08x = 482.08 × 321.28
  4. Step 4: Simplify right side
    350.08x = 154,882.66
  5. Step 5: Solve for x
    x = 154,882.66/350.08
  6. Step 6: Final answer
    x = 442.42

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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.