Home / 838,738.90-1,257,628.62-389,228.56

Finding the Fourth Proportional to 838,738.90, 1,257,628.62 and 389,228.56

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Solution

The fourth proportional to 838,738.90, 1,257,628.62 and 389,228.56 is: 583,620.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    838,738.90 : 1,257,628.62 = 389,228.56 : x
  2. Step 2: Convert to fraction form
    838,738.90/1,257,628.62 = 389,228.56/x
  3. Step 3: Cross multiply
    838,738.90x = 1,257,628.62 × 389,228.56
  4. Step 4: Simplify right side
    838,738.90x = 489,504,976,777.39
  5. Step 5: Solve for x
    x = 489,504,976,777.39/838,738.90
  6. Step 6: Final answer
    x = 583,620.21

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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.