Home / 2,065.87-2,850.90-1,121.66

Finding the Fourth Proportional to 2,065.87, 2,850.90 and 1,121.66

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Solution

The fourth proportional to 2,065.87, 2,850.90 and 1,121.66 is: 1,547.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,065.87 : 2,850.90 = 1,121.66 : x
  2. Step 2: Convert to fraction form
    2,065.87/2,850.90 = 1,121.66/x
  3. Step 3: Cross multiply
    2,065.87x = 2,850.90 × 1,121.66
  4. Step 4: Simplify right side
    2,065.87x = 3,197,723.44
  5. Step 5: Solve for x
    x = 3,197,723.44/2,065.87
  6. Step 6: Final answer
    x = 1,547.89

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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.