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Finding the Fourth Proportional to 298,745.20, 411,991.28 and 218,044.88

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Solution

The fourth proportional to 298,745.20, 411,991.28 and 218,044.88 is: 300,699.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,745.20 : 411,991.28 = 218,044.88 : x
  2. Step 2: Convert to fraction form
    298,745.20/411,991.28 = 218,044.88/x
  3. Step 3: Cross multiply
    298,745.20x = 411,991.28 × 218,044.88
  4. Step 4: Simplify right side
    298,745.20x = 89,832,589,208.65
  5. Step 5: Solve for x
    x = 89,832,589,208.65/298,745.20
  6. Step 6: Final answer
    x = 300,699.69

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1.5x scale

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.