Home / 2,780.78-4,169.32-1,667.68

Finding the Fourth Proportional to 2,780.78, 4,169.32 and 1,667.68

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Solution

The fourth proportional to 2,780.78, 4,169.32 and 1,667.68 is: 2,500.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.78 : 4,169.32 = 1,667.68 : x
  2. Step 2: Convert to fraction form
    2,780.78/4,169.32 = 1,667.68/x
  3. Step 3: Cross multiply
    2,780.78x = 4,169.32 × 1,667.68
  4. Step 4: Simplify right side
    2,780.78x = 6,953,076.99
  5. Step 5: Solve for x
    x = 6,953,076.99/2,780.78
  6. Step 6: Final answer
    x = 2,500.41

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1.5x scale

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.