Home / 2,168.91-2,985.48-1,919.79

Finding the Fourth Proportional to 2,168.91, 2,985.48 and 1,919.79

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Solution

The fourth proportional to 2,168.91, 2,985.48 and 1,919.79 is: 2,642.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,168.91 : 2,985.48 = 1,919.79 : x
  2. Step 2: Convert to fraction form
    2,168.91/2,985.48 = 1,919.79/x
  3. Step 3: Cross multiply
    2,168.91x = 2,985.48 × 1,919.79
  4. Step 4: Simplify right side
    2,168.91x = 5,731,494.65
  5. Step 5: Solve for x
    x = 5,731,494.65/2,168.91
  6. Step 6: Final answer
    x = 2,642.57

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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.