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Finding the Fourth Proportional to 350.74, 483.78 and 309.25

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Solution

The fourth proportional to 350.74, 483.78 and 309.25 is: 426.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    350.74 : 483.78 = 309.25 : x
  2. Step 2: Convert to fraction form
    350.74/483.78 = 309.25/x
  3. Step 3: Cross multiply
    350.74x = 483.78 × 309.25
  4. Step 4: Simplify right side
    350.74x = 149,608.97
  5. Step 5: Solve for x
    x = 149,608.97/350.74
  6. Step 6: Final answer
    x = 426.55

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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.