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Finding the Fourth Proportional to 344.21, 518.18 and 314.45

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Solution

The fourth proportional to 344.21, 518.18 and 314.45 is: 473.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.21 : 518.18 = 314.45 : x
  2. Step 2: Convert to fraction form
    344.21/518.18 = 314.45/x
  3. Step 3: Cross multiply
    344.21x = 518.18 × 314.45
  4. Step 4: Simplify right side
    344.21x = 162,940.91
  5. Step 5: Solve for x
    x = 162,940.91/344.21
  6. Step 6: Final answer
    x = 473.38

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.