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Finding the Fourth Proportional to 490.30, 676.93 and 303.99

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Solution

The fourth proportional to 490.30, 676.93 and 303.99 is: 419.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.30 : 676.93 = 303.99 : x
  2. Step 2: Convert to fraction form
    490.30/676.93 = 303.99/x
  3. Step 3: Cross multiply
    490.30x = 676.93 × 303.99
  4. Step 4: Simplify right side
    490.30x = 205,779.86
  5. Step 5: Solve for x
    x = 205,779.86/490.30
  6. Step 6: Final answer
    x = 419.70

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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.