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Finding the Fourth Proportional to 3,074.78, 4,612.18 and 994.70

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Solution

The fourth proportional to 3,074.78, 4,612.18 and 994.70 is: 1,492.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,074.78 : 4,612.18 = 994.70 : x
  2. Step 2: Convert to fraction form
    3,074.78/4,612.18 = 994.70/x
  3. Step 3: Cross multiply
    3,074.78x = 4,612.18 × 994.70
  4. Step 4: Simplify right side
    3,074.78x = 4,587,735.45
  5. Step 5: Solve for x
    x = 4,587,735.45/3,074.78
  6. Step 6: Final answer
    x = 1,492.05

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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.