Home / 490,396.24-677,189.46-309,429.28

Finding the Fourth Proportional to 490,396.24, 677,189.46 and 309,429.28

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Solution

The fourth proportional to 490,396.24, 677,189.46 and 309,429.28 is: 427,291.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,396.24 : 677,189.46 = 309,429.28 : x
  2. Step 2: Convert to fraction form
    490,396.24/677,189.46 = 309,429.28/x
  3. Step 3: Cross multiply
    490,396.24x = 677,189.46 × 309,429.28
  4. Step 4: Simplify right side
    490,396.24x = 209,542,247,031.39
  5. Step 5: Solve for x
    x = 209,542,247,031.39/490,396.24
  6. Step 6: Final answer
    x = 427,291.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.