Home / 2,801.60-4,194.30-1,878.20

Finding the Fourth Proportional to 2,801.60, 4,194.30 and 1,878.20

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Solution

The fourth proportional to 2,801.60, 4,194.30 and 1,878.20 is: 2,811.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,801.60 : 4,194.30 = 1,878.20 : x
  2. Step 2: Convert to fraction form
    2,801.60/4,194.30 = 1,878.20/x
  3. Step 3: Cross multiply
    2,801.60x = 4,194.30 × 1,878.20
  4. Step 4: Simplify right side
    2,801.60x = 7,877,734.26
  5. Step 5: Solve for x
    x = 7,877,734.26/2,801.60
  6. Step 6: Final answer
    x = 2,811.87

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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.