Home / 1,868.65-2,578.87-1,238.11

Finding the Fourth Proportional to 1,868.65, 2,578.87 and 1,238.11

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Solution

The fourth proportional to 1,868.65, 2,578.87 and 1,238.11 is: 1,708.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.65 : 2,578.87 = 1,238.11 : x
  2. Step 2: Convert to fraction form
    1,868.65/2,578.87 = 1,238.11/x
  3. Step 3: Cross multiply
    1,868.65x = 2,578.87 × 1,238.11
  4. Step 4: Simplify right side
    1,868.65x = 3,192,919.84
  5. Step 5: Solve for x
    x = 3,192,919.84/1,868.65
  6. Step 6: Final answer
    x = 1,708.68

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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.