Home / 2,126.07-3,189.31-664.83

Finding the Fourth Proportional to 2,126.07, 3,189.31 and 664.83

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Solution

The fourth proportional to 2,126.07, 3,189.31 and 664.83 is: 997.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.07 : 3,189.31 = 664.83 : x
  2. Step 2: Convert to fraction form
    2,126.07/3,189.31 = 664.83/x
  3. Step 3: Cross multiply
    2,126.07x = 3,189.31 × 664.83
  4. Step 4: Simplify right side
    2,126.07x = 2,120,347.31
  5. Step 5: Solve for x
    x = 2,120,347.31/2,126.07
  6. Step 6: Final answer
    x = 997.31

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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.