Home / 1,540.60-2,126.46-1,259.80

Finding the Fourth Proportional to 1,540.60, 2,126.46 and 1,259.80

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Solution

The fourth proportional to 1,540.60, 2,126.46 and 1,259.80 is: 1,738.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.60 : 2,126.46 = 1,259.80 : x
  2. Step 2: Convert to fraction form
    1,540.60/2,126.46 = 1,259.80/x
  3. Step 3: Cross multiply
    1,540.60x = 2,126.46 × 1,259.80
  4. Step 4: Simplify right side
    1,540.60x = 2,678,914.31
  5. Step 5: Solve for x
    x = 2,678,914.31/1,540.60
  6. Step 6: Final answer
    x = 1,738.88

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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.