Home / 2,120.34-3,180.87-659.21

Finding the Fourth Proportional to 2,120.34, 3,180.87 and 659.21

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Solution

The fourth proportional to 2,120.34, 3,180.87 and 659.21 is: 988.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.34 : 3,180.87 = 659.21 : x
  2. Step 2: Convert to fraction form
    2,120.34/3,180.87 = 659.21/x
  3. Step 3: Cross multiply
    2,120.34x = 3,180.87 × 659.21
  4. Step 4: Simplify right side
    2,120.34x = 2,096,845.41
  5. Step 5: Solve for x
    x = 2,096,845.41/2,120.34
  6. Step 6: Final answer
    x = 988.92

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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.