Home / 3,620.38-5,430.62-1,429.09

Finding the Fourth Proportional to 3,620.38, 5,430.62 and 1,429.09

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Solution

The fourth proportional to 3,620.38, 5,430.62 and 1,429.09 is: 2,143.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.38 : 5,430.62 = 1,429.09 : x
  2. Step 2: Convert to fraction form
    3,620.38/5,430.62 = 1,429.09/x
  3. Step 3: Cross multiply
    3,620.38x = 5,430.62 × 1,429.09
  4. Step 4: Simplify right side
    3,620.38x = 7,760,821.16
  5. Step 5: Solve for x
    x = 7,760,821.16/3,620.38
  6. Step 6: Final answer
    x = 2,143.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.