Home / 2,129.19-3,195.09-830.67

Finding the Fourth Proportional to 2,129.19, 3,195.09 and 830.67

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Solution

The fourth proportional to 2,129.19, 3,195.09 and 830.67 is: 1,246.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.19 : 3,195.09 = 830.67 : x
  2. Step 2: Convert to fraction form
    2,129.19/3,195.09 = 830.67/x
  3. Step 3: Cross multiply
    2,129.19x = 3,195.09 × 830.67
  4. Step 4: Simplify right side
    2,129.19x = 2,654,065.41
  5. Step 5: Solve for x
    x = 2,654,065.41/2,129.19
  6. Step 6: Final answer
    x = 1,246.51

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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.