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Finding the Fourth Proportional to 2,856.20, 4,284.36 and 908.48

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Solution

The fourth proportional to 2,856.20, 4,284.36 and 908.48 is: 1,362.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,856.20 : 4,284.36 = 908.48 : x
  2. Step 2: Convert to fraction form
    2,856.20/4,284.36 = 908.48/x
  3. Step 3: Cross multiply
    2,856.20x = 4,284.36 × 908.48
  4. Step 4: Simplify right side
    2,856.20x = 3,892,255.37
  5. Step 5: Solve for x
    x = 3,892,255.37/2,856.20
  6. Step 6: Final answer
    x = 1,362.74

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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.