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Finding the Fourth Proportional to 490.64, 677.32 and 351.44

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Solution

The fourth proportional to 490.64, 677.32 and 351.44 is: 485.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.64 : 677.32 = 351.44 : x
  2. Step 2: Convert to fraction form
    490.64/677.32 = 351.44/x
  3. Step 3: Cross multiply
    490.64x = 677.32 × 351.44
  4. Step 4: Simplify right side
    490.64x = 238,037.34
  5. Step 5: Solve for x
    x = 238,037.34/490.64
  6. Step 6: Final answer
    x = 485.16

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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.