Home / 2,145.03-3,217.21-828.59

Finding the Fourth Proportional to 2,145.03, 3,217.21 and 828.59

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Solution

The fourth proportional to 2,145.03, 3,217.21 and 828.59 is: 1,242.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.03 : 3,217.21 = 828.59 : x
  2. Step 2: Convert to fraction form
    2,145.03/3,217.21 = 828.59/x
  3. Step 3: Cross multiply
    2,145.03x = 3,217.21 × 828.59
  4. Step 4: Simplify right side
    2,145.03x = 2,665,748.03
  5. Step 5: Solve for x
    x = 2,665,748.03/2,145.03
  6. Step 6: Final answer
    x = 1,242.76

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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.