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Finding the Fourth Proportional to 350.81, 483.87 and 309.20

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Solution

The fourth proportional to 350.81, 483.87 and 309.20 is: 426.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    350.81 : 483.87 = 309.20 : x
  2. Step 2: Convert to fraction form
    350.81/483.87 = 309.20/x
  3. Step 3: Cross multiply
    350.81x = 483.87 × 309.20
  4. Step 4: Simplify right side
    350.81x = 149,612.60
  5. Step 5: Solve for x
    x = 149,612.60/350.81
  6. Step 6: Final answer
    x = 426.48

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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.