Home / 259,766.40-389,620.80-212,937.60

Finding the Fourth Proportional to 259,766.40, 389,620.80 and 212,937.60

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Solution

The fourth proportional to 259,766.40, 389,620.80 and 212,937.60 is: 319,382.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,766.40 : 389,620.80 = 212,937.60 : x
  2. Step 2: Convert to fraction form
    259,766.40/389,620.80 = 212,937.60/x
  3. Step 3: Cross multiply
    259,766.40x = 389,620.80 × 212,937.60
  4. Step 4: Simplify right side
    259,766.40x = 82,964,918,062.08
  5. Step 5: Solve for x
    x = 82,964,918,062.08/259,766.40
  6. Step 6: Final answer
    x = 319,382.79

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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.