Home / 2,119.16-3,160.86-1,997.23

Finding the Fourth Proportional to 2,119.16, 3,160.86 and 1,997.23

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Solution

The fourth proportional to 2,119.16, 3,160.86 and 1,997.23 is: 2,978.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.16 : 3,160.86 = 1,997.23 : x
  2. Step 2: Convert to fraction form
    2,119.16/3,160.86 = 1,997.23/x
  3. Step 3: Cross multiply
    2,119.16x = 3,160.86 × 1,997.23
  4. Step 4: Simplify right side
    2,119.16x = 6,312,964.42
  5. Step 5: Solve for x
    x = 6,312,964.42/2,119.16
  6. Step 6: Final answer
    x = 2,978.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.