Home / 2,780.50-4,167.16-2,081.68

Finding the Fourth Proportional to 2,780.50, 4,167.16 and 2,081.68

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Solution

The fourth proportional to 2,780.50, 4,167.16 and 2,081.68 is: 3,119.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.50 : 4,167.16 = 2,081.68 : x
  2. Step 2: Convert to fraction form
    2,780.50/4,167.16 = 2,081.68/x
  3. Step 3: Cross multiply
    2,780.50x = 4,167.16 × 2,081.68
  4. Step 4: Simplify right side
    2,780.50x = 8,674,693.63
  5. Step 5: Solve for x
    x = 8,674,693.63/2,780.50
  6. Step 6: Final answer
    x = 3,119.83

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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.