Home / 2,819.79-3,890.85-1,771.11

Finding the Fourth Proportional to 2,819.79, 3,890.85 and 1,771.11

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Solution

The fourth proportional to 2,819.79, 3,890.85 and 1,771.11 is: 2,443.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.79 : 3,890.85 = 1,771.11 : x
  2. Step 2: Convert to fraction form
    2,819.79/3,890.85 = 1,771.11/x
  3. Step 3: Cross multiply
    2,819.79x = 3,890.85 × 1,771.11
  4. Step 4: Simplify right side
    2,819.79x = 6,891,123.34
  5. Step 5: Solve for x
    x = 6,891,123.34/2,819.79
  6. Step 6: Final answer
    x = 2,443.84

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1.5x scale

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.