Home / 2,172.35-2,997.79-1,228.13

Finding the Fourth Proportional to 2,172.35, 2,997.79 and 1,228.13

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Solution

The fourth proportional to 2,172.35, 2,997.79 and 1,228.13 is: 1,694.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.35 : 2,997.79 = 1,228.13 : x
  2. Step 2: Convert to fraction form
    2,172.35/2,997.79 = 1,228.13/x
  3. Step 3: Cross multiply
    2,172.35x = 2,997.79 × 1,228.13
  4. Step 4: Simplify right side
    2,172.35x = 3,681,675.83
  5. Step 5: Solve for x
    x = 3,681,675.83/2,172.35
  6. Step 6: Final answer
    x = 1,694.79

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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.