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Finding the Fourth Proportional to 490.89, 677.39 and 344.01

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Solution

The fourth proportional to 490.89, 677.39 and 344.01 is: 474.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.89 : 677.39 = 344.01 : x
  2. Step 2: Convert to fraction form
    490.89/677.39 = 344.01/x
  3. Step 3: Cross multiply
    490.89x = 677.39 × 344.01
  4. Step 4: Simplify right side
    490.89x = 233,027.21
  5. Step 5: Solve for x
    x = 233,027.21/490.89
  6. Step 6: Final answer
    x = 474.70

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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.