Home / 3,821.89-5,272.87-2,405.68

Finding the Fourth Proportional to 3,821.89, 5,272.87 and 2,405.68

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Solution

The fourth proportional to 3,821.89, 5,272.87 and 2,405.68 is: 3,319.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,821.89 : 5,272.87 = 2,405.68 : x
  2. Step 2: Convert to fraction form
    3,821.89/5,272.87 = 2,405.68/x
  3. Step 3: Cross multiply
    3,821.89x = 5,272.87 × 2,405.68
  4. Step 4: Simplify right side
    3,821.89x = 12,684,859.64
  5. Step 5: Solve for x
    x = 12,684,859.64/3,821.89
  6. Step 6: Final answer
    x = 3,319.00

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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.