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Finding the Fourth Proportional to 344.20, 475.69 and 314.81

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Solution

The fourth proportional to 344.20, 475.69 and 314.81 is: 435.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.20 : 475.69 = 314.81 : x
  2. Step 2: Convert to fraction form
    344.20/475.69 = 314.81/x
  3. Step 3: Cross multiply
    344.20x = 475.69 × 314.81
  4. Step 4: Simplify right side
    344.20x = 149,751.97
  5. Step 5: Solve for x
    x = 149,751.97/344.20
  6. Step 6: Final answer
    x = 435.07

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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.