Home / 1,890.22-2,606.40-1,226.20

Finding the Fourth Proportional to 1,890.22, 2,606.40 and 1,226.20

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Solution

The fourth proportional to 1,890.22, 2,606.40 and 1,226.20 is: 1,690.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.22 : 2,606.40 = 1,226.20 : x
  2. Step 2: Convert to fraction form
    1,890.22/2,606.40 = 1,226.20/x
  3. Step 3: Cross multiply
    1,890.22x = 2,606.40 × 1,226.20
  4. Step 4: Simplify right side
    1,890.22x = 3,195,967.68
  5. Step 5: Solve for x
    x = 3,195,967.68/1,890.22
  6. Step 6: Final answer
    x = 1,690.79

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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.