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Finding the Fourth Proportional to 350.05, 482.79 and 280.12

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Solution

The fourth proportional to 350.05, 482.79 and 280.12 is: 386.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    350.05 : 482.79 = 280.12 : x
  2. Step 2: Convert to fraction form
    350.05/482.79 = 280.12/x
  3. Step 3: Cross multiply
    350.05x = 482.79 × 280.12
  4. Step 4: Simplify right side
    350.05x = 135,239.13
  5. Step 5: Solve for x
    x = 135,239.13/350.05
  6. Step 6: Final answer
    x = 386.34

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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.