Home / 1,867.88-2,578.21-1,121.99

Finding the Fourth Proportional to 1,867.88, 2,578.21 and 1,121.99

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Solution

The fourth proportional to 1,867.88, 2,578.21 and 1,121.99 is: 1,548.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,867.88 : 2,578.21 = 1,121.99 : x
  2. Step 2: Convert to fraction form
    1,867.88/2,578.21 = 1,121.99/x
  3. Step 3: Cross multiply
    1,867.88x = 2,578.21 × 1,121.99
  4. Step 4: Simplify right side
    1,867.88x = 2,892,710.14
  5. Step 5: Solve for x
    x = 2,892,710.14/1,867.88
  6. Step 6: Final answer
    x = 1,548.66

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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.