Home / 2,685.21-4,028.63-1,387.59

Finding the Fourth Proportional to 2,685.21, 4,028.63 and 1,387.59

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Solution

The fourth proportional to 2,685.21, 4,028.63 and 1,387.59 is: 2,081.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,685.21 : 4,028.63 = 1,387.59 : x
  2. Step 2: Convert to fraction form
    2,685.21/4,028.63 = 1,387.59/x
  3. Step 3: Cross multiply
    2,685.21x = 4,028.63 × 1,387.59
  4. Step 4: Simplify right side
    2,685.21x = 5,590,079.76
  5. Step 5: Solve for x
    x = 5,590,079.76/2,685.21
  6. Step 6: Final answer
    x = 2,081.80

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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.