Home / 2,163.20-2,985.36-1,379.12

Finding the Fourth Proportional to 2,163.20, 2,985.36 and 1,379.12

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Solution

The fourth proportional to 2,163.20, 2,985.36 and 1,379.12 is: 1,903.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.20 : 2,985.36 = 1,379.12 : x
  2. Step 2: Convert to fraction form
    2,163.20/2,985.36 = 1,379.12/x
  3. Step 3: Cross multiply
    2,163.20x = 2,985.36 × 1,379.12
  4. Step 4: Simplify right side
    2,163.20x = 4,117,169.68
  5. Step 5: Solve for x
    x = 4,117,169.68/2,163.20
  6. Step 6: Final answer
    x = 1,903.28

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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.