Home / 1,815.96-2,720.07-1,120.98

Finding the Fourth Proportional to 1,815.96, 2,720.07 and 1,120.98

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Solution

The fourth proportional to 1,815.96, 2,720.07 and 1,120.98 is: 1,679.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.96 : 2,720.07 = 1,120.98 : x
  2. Step 2: Convert to fraction form
    1,815.96/2,720.07 = 1,120.98/x
  3. Step 3: Cross multiply
    1,815.96x = 2,720.07 × 1,120.98
  4. Step 4: Simplify right side
    1,815.96x = 3,049,144.07
  5. Step 5: Solve for x
    x = 3,049,144.07/1,815.96
  6. Step 6: Final answer
    x = 1,679.08

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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.