Home / 259,772.40-389,629.80-212,943.60

Finding the Fourth Proportional to 259,772.40, 389,629.80 and 212,943.60

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Solution

The fourth proportional to 259,772.40, 389,629.80 and 212,943.60 is: 319,391.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,772.40 : 389,629.80 = 212,943.60 : x
  2. Step 2: Convert to fraction form
    259,772.40/389,629.80 = 212,943.60/x
  3. Step 3: Cross multiply
    259,772.40x = 389,629.80 × 212,943.60
  4. Step 4: Simplify right side
    259,772.40x = 82,969,172,279.28
  5. Step 5: Solve for x
    x = 82,969,172,279.28/259,772.40
  6. Step 6: Final answer
    x = 319,391.79

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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.