Home / 2,181.75-3,010.80-1,187.02

Finding the Fourth Proportional to 2,181.75, 3,010.80 and 1,187.02

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Solution

The fourth proportional to 2,181.75, 3,010.80 and 1,187.02 is: 1,638.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.75 : 3,010.80 = 1,187.02 : x
  2. Step 2: Convert to fraction form
    2,181.75/3,010.80 = 1,187.02/x
  3. Step 3: Cross multiply
    2,181.75x = 3,010.80 × 1,187.02
  4. Step 4: Simplify right side
    2,181.75x = 3,573,879.82
  5. Step 5: Solve for x
    x = 3,573,879.82/2,181.75
  6. Step 6: Final answer
    x = 1,638.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.