Home / 426,942.63-640,519.06-300,829.20

Finding the Fourth Proportional to 426,942.63, 640,519.06 and 300,829.20

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Solution

The fourth proportional to 426,942.63, 640,519.06 and 300,829.20 is: 451,317.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,942.63 : 640,519.06 = 300,829.20 : x
  2. Step 2: Convert to fraction form
    426,942.63/640,519.06 = 300,829.20/x
  3. Step 3: Cross multiply
    426,942.63x = 640,519.06 × 300,829.20
  4. Step 4: Simplify right side
    426,942.63x = 192,686,836,404.55
  5. Step 5: Solve for x
    x = 192,686,836,404.55/426,942.63
  6. Step 6: Final answer
    x = 451,317.87

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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.