Home / 2,126.16-3,189.06-665.46

Finding the Fourth Proportional to 2,126.16, 3,189.06 and 665.46

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Solution

The fourth proportional to 2,126.16, 3,189.06 and 665.46 is: 998.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.16 : 3,189.06 = 665.46 : x
  2. Step 2: Convert to fraction form
    2,126.16/3,189.06 = 665.46/x
  3. Step 3: Cross multiply
    2,126.16x = 3,189.06 × 665.46
  4. Step 4: Simplify right side
    2,126.16x = 2,122,191.87
  5. Step 5: Solve for x
    x = 2,122,191.87/2,126.16
  6. Step 6: Final answer
    x = 998.13

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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.