Home / 1,905.20-2,873.36-1,818.80

Finding the Fourth Proportional to 1,905.20, 2,873.36 and 1,818.80

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Solution

The fourth proportional to 1,905.20, 2,873.36 and 1,818.80 is: 2,743.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.20 : 2,873.36 = 1,818.80 : x
  2. Step 2: Convert to fraction form
    1,905.20/2,873.36 = 1,818.80/x
  3. Step 3: Cross multiply
    1,905.20x = 2,873.36 × 1,818.80
  4. Step 4: Simplify right side
    1,905.20x = 5,226,067.17
  5. Step 5: Solve for x
    x = 5,226,067.17/1,905.20
  6. Step 6: Final answer
    x = 2,743.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.