Home / 2,126.28-3,189.15-665.58

Finding the Fourth Proportional to 2,126.28, 3,189.15 and 665.58

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Solution

The fourth proportional to 2,126.28, 3,189.15 and 665.58 is: 998.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.28 : 3,189.15 = 665.58 : x
  2. Step 2: Convert to fraction form
    2,126.28/3,189.15 = 665.58/x
  3. Step 3: Cross multiply
    2,126.28x = 3,189.15 × 665.58
  4. Step 4: Simplify right side
    2,126.28x = 2,122,634.46
  5. Step 5: Solve for x
    x = 2,122,634.46/2,126.28
  6. Step 6: Final answer
    x = 998.29

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1.5x scale

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.