Home / 2,126.80-3,190.41-665.98

Finding the Fourth Proportional to 2,126.80, 3,190.41 and 665.98

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Solution

The fourth proportional to 2,126.80, 3,190.41 and 665.98 is: 999.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.80 : 3,190.41 = 665.98 : x
  2. Step 2: Convert to fraction form
    2,126.80/3,190.41 = 665.98/x
  3. Step 3: Cross multiply
    2,126.80x = 3,190.41 × 665.98
  4. Step 4: Simplify right side
    2,126.80x = 2,124,749.25
  5. Step 5: Solve for x
    x = 2,124,749.25/2,126.80
  6. Step 6: Final answer
    x = 999.04

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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.