Home / 1,628.20-2,247.78-965.80

Finding the Fourth Proportional to 1,628.20, 2,247.78 and 965.80

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Solution

The fourth proportional to 1,628.20, 2,247.78 and 965.80 is: 1,333.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.20 : 2,247.78 = 965.80 : x
  2. Step 2: Convert to fraction form
    1,628.20/2,247.78 = 965.80/x
  3. Step 3: Cross multiply
    1,628.20x = 2,247.78 × 965.80
  4. Step 4: Simplify right side
    1,628.20x = 2,170,905.92
  5. Step 5: Solve for x
    x = 2,170,905.92/1,628.20
  6. Step 6: Final answer
    x = 1,333.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.