Home / 2,389.91-3,584.85-1,638.68

Finding the Fourth Proportional to 2,389.91, 3,584.85 and 1,638.68

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Solution

The fourth proportional to 2,389.91, 3,584.85 and 1,638.68 is: 2,458.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,389.91 : 3,584.85 = 1,638.68 : x
  2. Step 2: Convert to fraction form
    2,389.91/3,584.85 = 1,638.68/x
  3. Step 3: Cross multiply
    2,389.91x = 3,584.85 × 1,638.68
  4. Step 4: Simplify right side
    2,389.91x = 5,874,422.00
  5. Step 5: Solve for x
    x = 5,874,422.00/2,389.91
  6. Step 6: Final answer
    x = 2,458.01

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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.