Home / 2,155.74-3,226.29-1,290.66

Finding the Fourth Proportional to 2,155.74, 3,226.29 and 1,290.66

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Solution

The fourth proportional to 2,155.74, 3,226.29 and 1,290.66 is: 1,931.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.74 : 3,226.29 = 1,290.66 : x
  2. Step 2: Convert to fraction form
    2,155.74/3,226.29 = 1,290.66/x
  3. Step 3: Cross multiply
    2,155.74x = 3,226.29 × 1,290.66
  4. Step 4: Simplify right side
    2,155.74x = 4,164,043.45
  5. Step 5: Solve for x
    x = 4,164,043.45/2,155.74
  6. Step 6: Final answer
    x = 1,931.61

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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.