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Finding the Fourth Proportional to 3,072.60, 4,608.30 and 992.10

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Solution

The fourth proportional to 3,072.60, 4,608.30 and 992.10 is: 1,487.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,072.60 : 4,608.30 = 992.10 : x
  2. Step 2: Convert to fraction form
    3,072.60/4,608.30 = 992.10/x
  3. Step 3: Cross multiply
    3,072.60x = 4,608.30 × 992.10
  4. Step 4: Simplify right side
    3,072.60x = 4,571,894.43
  5. Step 5: Solve for x
    x = 4,571,894.43/3,072.60
  6. Step 6: Final answer
    x = 1,487.96

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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.