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Finding the Fourth Proportional to 2,856.36, 4,284.72 and 908.64

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Solution

The fourth proportional to 2,856.36, 4,284.72 and 908.64 is: 1,363.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,856.36 : 4,284.72 = 908.64 : x
  2. Step 2: Convert to fraction form
    2,856.36/4,284.72 = 908.64/x
  3. Step 3: Cross multiply
    2,856.36x = 4,284.72 × 908.64
  4. Step 4: Simplify right side
    2,856.36x = 3,893,267.98
  5. Step 5: Solve for x
    x = 3,893,267.98/2,856.36
  6. Step 6: Final answer
    x = 1,363.02

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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.