Home / 2,840.20-4,259.46-1,279.30

Finding the Fourth Proportional to 2,840.20, 4,259.46 and 1,279.30

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Solution

The fourth proportional to 2,840.20, 4,259.46 and 1,279.30 is: 1,918.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.20 : 4,259.46 = 1,279.30 : x
  2. Step 2: Convert to fraction form
    2,840.20/4,259.46 = 1,279.30/x
  3. Step 3: Cross multiply
    2,840.20x = 4,259.46 × 1,279.30
  4. Step 4: Simplify right side
    2,840.20x = 5,449,127.18
  5. Step 5: Solve for x
    x = 5,449,127.18/2,840.20
  6. Step 6: Final answer
    x = 1,918.57

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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.