Home / 3,111.07-4,665.21-919.03

Finding the Fourth Proportional to 3,111.07, 4,665.21 and 919.03

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Solution

The fourth proportional to 3,111.07, 4,665.21 and 919.03 is: 1,378.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.07 : 4,665.21 = 919.03 : x
  2. Step 2: Convert to fraction form
    3,111.07/4,665.21 = 919.03/x
  3. Step 3: Cross multiply
    3,111.07x = 4,665.21 × 919.03
  4. Step 4: Simplify right side
    3,111.07x = 4,287,467.95
  5. Step 5: Solve for x
    x = 4,287,467.95/3,111.07
  6. Step 6: Final answer
    x = 1,378.13

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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.