Home / 2,890.29-3,987.98-2,218.86

Finding the Fourth Proportional to 2,890.29, 3,987.98 and 2,218.86

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Solution

The fourth proportional to 2,890.29, 3,987.98 and 2,218.86 is: 3,061.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.29 : 3,987.98 = 2,218.86 : x
  2. Step 2: Convert to fraction form
    2,890.29/3,987.98 = 2,218.86/x
  3. Step 3: Cross multiply
    2,890.29x = 3,987.98 × 2,218.86
  4. Step 4: Simplify right side
    2,890.29x = 8,848,758.21
  5. Step 5: Solve for x
    x = 8,848,758.21/2,890.29
  6. Step 6: Final answer
    x = 3,061.55

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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.