Home / 2,185.08-3,278.96-1,405.58

Finding the Fourth Proportional to 2,185.08, 3,278.96 and 1,405.58

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Solution

The fourth proportional to 2,185.08, 3,278.96 and 1,405.58 is: 2,109.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.08 : 3,278.96 = 1,405.58 : x
  2. Step 2: Convert to fraction form
    2,185.08/3,278.96 = 1,405.58/x
  3. Step 3: Cross multiply
    2,185.08x = 3,278.96 × 1,405.58
  4. Step 4: Simplify right side
    2,185.08x = 4,608,817.17
  5. Step 5: Solve for x
    x = 4,608,817.17/2,185.08
  6. Step 6: Final answer
    x = 2,109.22

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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.