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Finding the Fourth Proportional to 4,612.88, 6,919.32 and 2,639.12

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Solution

The fourth proportional to 4,612.88, 6,919.32 and 2,639.12 is: 3,958.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,612.88 : 6,919.32 = 2,639.12 : x
  2. Step 2: Convert to fraction form
    4,612.88/6,919.32 = 2,639.12/x
  3. Step 3: Cross multiply
    4,612.88x = 6,919.32 × 2,639.12
  4. Step 4: Simplify right side
    4,612.88x = 18,260,915.80
  5. Step 5: Solve for x
    x = 18,260,915.80/4,612.88
  6. Step 6: Final answer
    x = 3,958.68

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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.