Home / 670,628.60-1,005,942.90-221,418.80

Finding the Fourth Proportional to 670,628.60, 1,005,942.90 and 221,418.80

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Solution

The fourth proportional to 670,628.60, 1,005,942.90 and 221,418.80 is: 332,128.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,628.60 : 1,005,942.90 = 221,418.80 : x
  2. Step 2: Convert to fraction form
    670,628.60/1,005,942.90 = 221,418.80/x
  3. Step 3: Cross multiply
    670,628.60x = 1,005,942.90 × 221,418.80
  4. Step 4: Simplify right side
    670,628.60x = 222,734,669,786.52
  5. Step 5: Solve for x
    x = 222,734,669,786.52/670,628.60
  6. Step 6: Final answer
    x = 332,128.20

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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.