Home / 2,786.65-4,178.14-1,119.67

Finding the Fourth Proportional to 2,786.65, 4,178.14 and 1,119.67

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Solution

The fourth proportional to 2,786.65, 4,178.14 and 1,119.67 is: 1,678.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,786.65 : 4,178.14 = 1,119.67 : x
  2. Step 2: Convert to fraction form
    2,786.65/4,178.14 = 1,119.67/x
  3. Step 3: Cross multiply
    2,786.65x = 4,178.14 × 1,119.67
  4. Step 4: Simplify right side
    2,786.65x = 4,678,138.01
  5. Step 5: Solve for x
    x = 4,678,138.01/2,786.65
  6. Step 6: Final answer
    x = 1,678.77

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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.