Home / 1,989.87-2,982.66-1,259.65

Finding the Fourth Proportional to 1,989.87, 2,982.66 and 1,259.65

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Solution

The fourth proportional to 1,989.87, 2,982.66 and 1,259.65 is: 1,888.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.87 : 2,982.66 = 1,259.65 : x
  2. Step 2: Convert to fraction form
    1,989.87/2,982.66 = 1,259.65/x
  3. Step 3: Cross multiply
    1,989.87x = 2,982.66 × 1,259.65
  4. Step 4: Simplify right side
    1,989.87x = 3,757,107.67
  5. Step 5: Solve for x
    x = 3,757,107.67/1,989.87
  6. Step 6: Final answer
    x = 1,888.12

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1.5x scale

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.