Home / 259,764.90-389,618.55-212,936.10

Finding the Fourth Proportional to 259,764.90, 389,618.55 and 212,936.10

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Solution

The fourth proportional to 259,764.90, 389,618.55 and 212,936.10 is: 319,380.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,764.90 : 389,618.55 = 212,936.10 : x
  2. Step 2: Convert to fraction form
    259,764.90/389,618.55 = 212,936.10/x
  3. Step 3: Cross multiply
    259,764.90x = 389,618.55 × 212,936.10
  4. Step 4: Simplify right side
    259,764.90x = 82,963,854,524.66
  5. Step 5: Solve for x
    x = 82,963,854,524.66/259,764.90
  6. Step 6: Final answer
    x = 319,380.54

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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.