Home / 3,126.60-4,690.44-1,278.72

Finding the Fourth Proportional to 3,126.60, 4,690.44 and 1,278.72

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Solution

The fourth proportional to 3,126.60, 4,690.44 and 1,278.72 is: 1,918.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.60 : 4,690.44 = 1,278.72 : x
  2. Step 2: Convert to fraction form
    3,126.60/4,690.44 = 1,278.72/x
  3. Step 3: Cross multiply
    3,126.60x = 4,690.44 × 1,278.72
  4. Step 4: Simplify right side
    3,126.60x = 5,997,759.44
  5. Step 5: Solve for x
    x = 5,997,759.44/3,126.60
  6. Step 6: Final answer
    x = 1,918.30

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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.