Home / 2,173.20-2,997.66-1,288.38

Finding the Fourth Proportional to 2,173.20, 2,997.66 and 1,288.38

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Solution

The fourth proportional to 2,173.20, 2,997.66 and 1,288.38 is: 1,777.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,173.20 : 2,997.66 = 1,288.38 : x
  2. Step 2: Convert to fraction form
    2,173.20/2,997.66 = 1,288.38/x
  3. Step 3: Cross multiply
    2,173.20x = 2,997.66 × 1,288.38
  4. Step 4: Simplify right side
    2,173.20x = 3,862,125.19
  5. Step 5: Solve for x
    x = 3,862,125.19/2,173.20
  6. Step 6: Final answer
    x = 1,777.16

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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.