Home / 2,790.24-4,185.30-842.40

Finding the Fourth Proportional to 2,790.24, 4,185.30 and 842.40

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Solution

The fourth proportional to 2,790.24, 4,185.30 and 842.40 is: 1,263.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.24 : 4,185.30 = 842.40 : x
  2. Step 2: Convert to fraction form
    2,790.24/4,185.30 = 842.40/x
  3. Step 3: Cross multiply
    2,790.24x = 4,185.30 × 842.40
  4. Step 4: Simplify right side
    2,790.24x = 3,525,696.72
  5. Step 5: Solve for x
    x = 3,525,696.72/2,790.24
  6. Step 6: Final answer
    x = 1,263.58

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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.