Home / 2,279.12-3,144.40-1,284.24

Finding the Fourth Proportional to 2,279.12, 3,144.40 and 1,284.24

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Solution

The fourth proportional to 2,279.12, 3,144.40 and 1,284.24 is: 1,771.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.12 : 3,144.40 = 1,284.24 : x
  2. Step 2: Convert to fraction form
    2,279.12/3,144.40 = 1,284.24/x
  3. Step 3: Cross multiply
    2,279.12x = 3,144.40 × 1,284.24
  4. Step 4: Simplify right side
    2,279.12x = 4,038,164.26
  5. Step 5: Solve for x
    x = 4,038,164.26/2,279.12
  6. Step 6: Final answer
    x = 1,771.81

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1.5x scale

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.