Home / 1,815.12-2,720.64-1,083.18

Finding the Fourth Proportional to 1,815.12, 2,720.64 and 1,083.18

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Solution

The fourth proportional to 1,815.12, 2,720.64 and 1,083.18 is: 1,623.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.12 : 2,720.64 = 1,083.18 : x
  2. Step 2: Convert to fraction form
    1,815.12/2,720.64 = 1,083.18/x
  3. Step 3: Cross multiply
    1,815.12x = 2,720.64 × 1,083.18
  4. Step 4: Simplify right side
    1,815.12x = 2,946,942.84
  5. Step 5: Solve for x
    x = 2,946,942.84/1,815.12
  6. Step 6: Final answer
    x = 1,623.55

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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.