Home / 2,128.29-3,199.72-1,967.91

Finding the Fourth Proportional to 2,128.29, 3,199.72 and 1,967.91

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Solution

The fourth proportional to 2,128.29, 3,199.72 and 1,967.91 is: 2,958.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.29 : 3,199.72 = 1,967.91 : x
  2. Step 2: Convert to fraction form
    2,128.29/3,199.72 = 1,967.91/x
  3. Step 3: Cross multiply
    2,128.29x = 3,199.72 × 1,967.91
  4. Step 4: Simplify right side
    2,128.29x = 6,296,744.99
  5. Step 5: Solve for x
    x = 6,296,744.99/2,128.29
  6. Step 6: Final answer
    x = 2,958.60

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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.