Home / 2,143.77-3,215.04-1,220.06

Finding the Fourth Proportional to 2,143.77, 3,215.04 and 1,220.06

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Solution

The fourth proportional to 2,143.77, 3,215.04 and 1,220.06 is: 1,829.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.77 : 3,215.04 = 1,220.06 : x
  2. Step 2: Convert to fraction form
    2,143.77/3,215.04 = 1,220.06/x
  3. Step 3: Cross multiply
    2,143.77x = 3,215.04 × 1,220.06
  4. Step 4: Simplify right side
    2,143.77x = 3,922,552.03
  5. Step 5: Solve for x
    x = 3,922,552.03/2,143.77
  6. Step 6: Final answer
    x = 1,829.75

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1.5x scale

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.