Home / 2,819.28-3,885.64-2,378.32

Finding the Fourth Proportional to 2,819.28, 3,885.64 and 2,378.32

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Solution

The fourth proportional to 2,819.28, 3,885.64 and 2,378.32 is: 3,277.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.28 : 3,885.64 = 2,378.32 : x
  2. Step 2: Convert to fraction form
    2,819.28/3,885.64 = 2,378.32/x
  3. Step 3: Cross multiply
    2,819.28x = 3,885.64 × 2,378.32
  4. Step 4: Simplify right side
    2,819.28x = 9,241,295.32
  5. Step 5: Solve for x
    x = 9,241,295.32/2,819.28
  6. Step 6: Final answer
    x = 3,277.89

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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.