Home / 2,193.12-3,284.88-1,421.28

Finding the Fourth Proportional to 2,193.12, 3,284.88 and 1,421.28

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Solution

The fourth proportional to 2,193.12, 3,284.88 and 1,421.28 is: 2,128.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,193.12 : 3,284.88 = 1,421.28 : x
  2. Step 2: Convert to fraction form
    2,193.12/3,284.88 = 1,421.28/x
  3. Step 3: Cross multiply
    2,193.12x = 3,284.88 × 1,421.28
  4. Step 4: Simplify right side
    2,193.12x = 4,668,734.25
  5. Step 5: Solve for x
    x = 4,668,734.25/2,193.12
  6. Step 6: Final answer
    x = 2,128.81

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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.