Home / 2,118.20-3,175.86-1,023.80

Finding the Fourth Proportional to 2,118.20, 3,175.86 and 1,023.80

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Solution

The fourth proportional to 2,118.20, 3,175.86 and 1,023.80 is: 1,535.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.20 : 3,175.86 = 1,023.80 : x
  2. Step 2: Convert to fraction form
    2,118.20/3,175.86 = 1,023.80/x
  3. Step 3: Cross multiply
    2,118.20x = 3,175.86 × 1,023.80
  4. Step 4: Simplify right side
    2,118.20x = 3,251,445.47
  5. Step 5: Solve for x
    x = 3,251,445.47/2,118.20
  6. Step 6: Final answer
    x = 1,535.00

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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.