Home / 309,987.24-427,984.10-189,198.55

Finding the Fourth Proportional to 309,987.24, 427,984.10 and 189,198.55

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Solution

The fourth proportional to 309,987.24, 427,984.10 and 189,198.55 is: 261,217.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,987.24 : 427,984.10 = 189,198.55 : x
  2. Step 2: Convert to fraction form
    309,987.24/427,984.10 = 189,198.55/x
  3. Step 3: Cross multiply
    309,987.24x = 427,984.10 × 189,198.55
  4. Step 4: Simplify right side
    309,987.24x = 80,973,971,143.06
  5. Step 5: Solve for x
    x = 80,973,971,143.06/309,987.24
  6. Step 6: Final answer
    x = 261,217.11

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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.