Home / 2,163.28-2,985.39-1,219.11

Finding the Fourth Proportional to 2,163.28, 2,985.39 and 1,219.11

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Solution

The fourth proportional to 2,163.28, 2,985.39 and 1,219.11 is: 1,682.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.28 : 2,985.39 = 1,219.11 : x
  2. Step 2: Convert to fraction form
    2,163.28/2,985.39 = 1,219.11/x
  3. Step 3: Cross multiply
    2,163.28x = 2,985.39 × 1,219.11
  4. Step 4: Simplify right side
    2,163.28x = 3,639,518.80
  5. Step 5: Solve for x
    x = 3,639,518.80/2,163.28
  6. Step 6: Final answer
    x = 1,682.41

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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.