Home / 1,820.12-2,730.20-1,089.09

Finding the Fourth Proportional to 1,820.12, 2,730.20 and 1,089.09

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Solution

The fourth proportional to 1,820.12, 2,730.20 and 1,089.09 is: 1,633.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,820.12 : 2,730.20 = 1,089.09 : x
  2. Step 2: Convert to fraction form
    1,820.12/2,730.20 = 1,089.09/x
  3. Step 3: Cross multiply
    1,820.12x = 2,730.20 × 1,089.09
  4. Step 4: Simplify right side
    1,820.12x = 2,973,428.07
  5. Step 5: Solve for x
    x = 2,973,428.07/1,820.12
  6. Step 6: Final answer
    x = 1,633.65

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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.