Home / 259,768.40-389,623.80-212,939.60

Finding the Fourth Proportional to 259,768.40, 389,623.80 and 212,939.60

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Solution

The fourth proportional to 259,768.40, 389,623.80 and 212,939.60 is: 319,385.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,768.40 : 389,623.80 = 212,939.60 : x
  2. Step 2: Convert to fraction form
    259,768.40/389,623.80 = 212,939.60/x
  3. Step 3: Cross multiply
    259,768.40x = 389,623.80 × 212,939.60
  4. Step 4: Simplify right side
    259,768.40x = 82,966,336,122.48
  5. Step 5: Solve for x
    x = 82,966,336,122.48/259,768.40
  6. Step 6: Final answer
    x = 319,385.79

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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.