Home / 259,771.40-389,628.30-212,942.60

Finding the Fourth Proportional to 259,771.40, 389,628.30 and 212,942.60

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Solution

The fourth proportional to 259,771.40, 389,628.30 and 212,942.60 is: 319,390.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,771.40 : 389,628.30 = 212,942.60 : x
  2. Step 2: Convert to fraction form
    259,771.40/389,628.30 = 212,942.60/x
  3. Step 3: Cross multiply
    259,771.40x = 389,628.30 × 212,942.60
  4. Step 4: Simplify right side
    259,771.40x = 82,968,463,235.58
  5. Step 5: Solve for x
    x = 82,968,463,235.58/259,771.40
  6. Step 6: Final answer
    x = 319,390.29

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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.