Home / 259,964.40-389,946.60-212,725.20

Finding the Fourth Proportional to 259,964.40, 389,946.60 and 212,725.20

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Solution

The fourth proportional to 259,964.40, 389,946.60 and 212,725.20 is: 319,087.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,964.40 : 389,946.60 = 212,725.20 : x
  2. Step 2: Convert to fraction form
    259,964.40/389,946.60 = 212,725.20/x
  3. Step 3: Cross multiply
    259,964.40x = 389,946.60 × 212,725.20
  4. Step 4: Simplify right side
    259,964.40x = 82,951,468,474.32
  5. Step 5: Solve for x
    x = 82,951,468,474.32/259,964.40
  6. Step 6: Final answer
    x = 319,087.80

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1.5x scale

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.