Home / 2,126.50-3,190.11-665.37

Finding the Fourth Proportional to 2,126.50, 3,190.11 and 665.37

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Solution

The fourth proportional to 2,126.50, 3,190.11 and 665.37 is: 998.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.50 : 3,190.11 = 665.37 : x
  2. Step 2: Convert to fraction form
    2,126.50/3,190.11 = 665.37/x
  3. Step 3: Cross multiply
    2,126.50x = 3,190.11 × 665.37
  4. Step 4: Simplify right side
    2,126.50x = 2,122,587.54
  5. Step 5: Solve for x
    x = 2,122,587.54/2,126.50
  6. Step 6: Final answer
    x = 998.16

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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.