Home / 2,289.20-3,164.28-2,107.76

Finding the Fourth Proportional to 2,289.20, 3,164.28 and 2,107.76

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Solution

The fourth proportional to 2,289.20, 3,164.28 and 2,107.76 is: 2,913.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,289.20 : 3,164.28 = 2,107.76 : x
  2. Step 2: Convert to fraction form
    2,289.20/3,164.28 = 2,107.76/x
  3. Step 3: Cross multiply
    2,289.20x = 3,164.28 × 2,107.76
  4. Step 4: Simplify right side
    2,289.20x = 6,669,542.81
  5. Step 5: Solve for x
    x = 6,669,542.81/2,289.20
  6. Step 6: Final answer
    x = 2,913.48

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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.