Home / 2,163.71-2,985.40-1,219.57

Finding the Fourth Proportional to 2,163.71, 2,985.40 and 1,219.57

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Solution

The fourth proportional to 2,163.71, 2,985.40 and 1,219.57 is: 1,682.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.71 : 2,985.40 = 1,219.57 : x
  2. Step 2: Convert to fraction form
    2,163.71/2,985.40 = 1,219.57/x
  3. Step 3: Cross multiply
    2,163.71x = 2,985.40 × 1,219.57
  4. Step 4: Simplify right side
    2,163.71x = 3,640,904.28
  5. Step 5: Solve for x
    x = 3,640,904.28/2,163.71
  6. Step 6: Final answer
    x = 1,682.71

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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.