Home / 1,619.65-2,234.10-1,221.94

Finding the Fourth Proportional to 1,619.65, 2,234.10 and 1,221.94

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Solution

The fourth proportional to 1,619.65, 2,234.10 and 1,221.94 is: 1,685.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619.65 : 2,234.10 = 1,221.94 : x
  2. Step 2: Convert to fraction form
    1,619.65/2,234.10 = 1,221.94/x
  3. Step 3: Cross multiply
    1,619.65x = 2,234.10 × 1,221.94
  4. Step 4: Simplify right side
    1,619.65x = 2,729,930.57
  5. Step 5: Solve for x
    x = 2,729,930.57/1,619.65
  6. Step 6: Final answer
    x = 1,685.51

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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.