Home / 2,181.53-3,271.13-1,139.01

Finding the Fourth Proportional to 2,181.53, 3,271.13 and 1,139.01

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Solution

The fourth proportional to 2,181.53, 3,271.13 and 1,139.01 is: 1,707.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.53 : 3,271.13 = 1,139.01 : x
  2. Step 2: Convert to fraction form
    2,181.53/3,271.13 = 1,139.01/x
  3. Step 3: Cross multiply
    2,181.53x = 3,271.13 × 1,139.01
  4. Step 4: Simplify right side
    2,181.53x = 3,725,860.90
  5. Step 5: Solve for x
    x = 3,725,860.90/2,181.53
  6. Step 6: Final answer
    x = 1,707.91

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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.