Home / 2,181.99-3,011.18-1,187.29

Finding the Fourth Proportional to 2,181.99, 3,011.18 and 1,187.29

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Solution

The fourth proportional to 2,181.99, 3,011.18 and 1,187.29 is: 1,638.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.99 : 3,011.18 = 1,187.29 : x
  2. Step 2: Convert to fraction form
    2,181.99/3,011.18 = 1,187.29/x
  3. Step 3: Cross multiply
    2,181.99x = 3,011.18 × 1,187.29
  4. Step 4: Simplify right side
    2,181.99x = 3,575,143.90
  5. Step 5: Solve for x
    x = 3,575,143.90/2,181.99
  6. Step 6: Final answer
    x = 1,638.48

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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.