Home / 2,126.12-3,187.98-664.88

Finding the Fourth Proportional to 2,126.12, 3,187.98 and 664.88

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Solution

The fourth proportional to 2,126.12, 3,187.98 and 664.88 is: 996.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.12 : 3,187.98 = 664.88 : x
  2. Step 2: Convert to fraction form
    2,126.12/3,187.98 = 664.88/x
  3. Step 3: Cross multiply
    2,126.12x = 3,187.98 × 664.88
  4. Step 4: Simplify right side
    2,126.12x = 2,119,624.14
  5. Step 5: Solve for x
    x = 2,119,624.14/2,126.12
  6. Step 6: Final answer
    x = 996.94

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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.