Home / 2,126.16-3,189.60-664.92

Finding the Fourth Proportional to 2,126.16, 3,189.60 and 664.92

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Solution

The fourth proportional to 2,126.16, 3,189.60 and 664.92 is: 997.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.16 : 3,189.60 = 664.92 : x
  2. Step 2: Convert to fraction form
    2,126.16/3,189.60 = 664.92/x
  3. Step 3: Cross multiply
    2,126.16x = 3,189.60 × 664.92
  4. Step 4: Simplify right side
    2,126.16x = 2,120,828.83
  5. Step 5: Solve for x
    x = 2,120,828.83/2,126.16
  6. Step 6: Final answer
    x = 997.49

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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.