Home / 3,178.34-4,383.35-1,919.09

Finding the Fourth Proportional to 3,178.34, 4,383.35 and 1,919.09

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Solution

The fourth proportional to 3,178.34, 4,383.35 and 1,919.09 is: 2,646.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.34 : 4,383.35 = 1,919.09 : x
  2. Step 2: Convert to fraction form
    3,178.34/4,383.35 = 1,919.09/x
  3. Step 3: Cross multiply
    3,178.34x = 4,383.35 × 1,919.09
  4. Step 4: Simplify right side
    3,178.34x = 8,412,051.71
  5. Step 5: Solve for x
    x = 8,412,051.71/3,178.34
  6. Step 6: Final answer
    x = 2,646.68

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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.