Home / 2,111.04-3,166.56-1,278.32

Finding the Fourth Proportional to 2,111.04, 3,166.56 and 1,278.32

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Solution

The fourth proportional to 2,111.04, 3,166.56 and 1,278.32 is: 1,917.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,111.04 : 3,166.56 = 1,278.32 : x
  2. Step 2: Convert to fraction form
    2,111.04/3,166.56 = 1,278.32/x
  3. Step 3: Cross multiply
    2,111.04x = 3,166.56 × 1,278.32
  4. Step 4: Simplify right side
    2,111.04x = 4,047,861.15
  5. Step 5: Solve for x
    x = 4,047,861.15/2,111.04
  6. Step 6: Final answer
    x = 1,917.47

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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.