Home / 2,389.21-3,582.90-1,139.58

Finding the Fourth Proportional to 2,389.21, 3,582.90 and 1,139.58

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Solution

The fourth proportional to 2,389.21, 3,582.90 and 1,139.58 is: 1,708.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,389.21 : 3,582.90 = 1,139.58 : x
  2. Step 2: Convert to fraction form
    2,389.21/3,582.90 = 1,139.58/x
  3. Step 3: Cross multiply
    2,389.21x = 3,582.90 × 1,139.58
  4. Step 4: Simplify right side
    2,389.21x = 4,083,007.09
  5. Step 5: Solve for x
    x = 4,083,007.09/2,389.21
  6. Step 6: Final answer
    x = 1,708.94

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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.