Home / 2,639.07-3,959.40-790.25

Finding the Fourth Proportional to 2,639.07, 3,959.40 and 790.25

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Solution

The fourth proportional to 2,639.07, 3,959.40 and 790.25 is: 1,185.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.07 : 3,959.40 = 790.25 : x
  2. Step 2: Convert to fraction form
    2,639.07/3,959.40 = 790.25/x
  3. Step 3: Cross multiply
    2,639.07x = 3,959.40 × 790.25
  4. Step 4: Simplify right side
    2,639.07x = 3,128,896.05
  5. Step 5: Solve for x
    x = 3,128,896.05/2,639.07
  6. Step 6: Final answer
    x = 1,185.61

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1.5x scale

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.