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Finding the Fourth Proportional to 3,072.78, 4,609.17 and 992.70

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Solution

The fourth proportional to 3,072.78, 4,609.17 and 992.70 is: 1,489.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,072.78 : 4,609.17 = 992.70 : x
  2. Step 2: Convert to fraction form
    3,072.78/4,609.17 = 992.70/x
  3. Step 3: Cross multiply
    3,072.78x = 4,609.17 × 992.70
  4. Step 4: Simplify right side
    3,072.78x = 4,575,523.06
  5. Step 5: Solve for x
    x = 4,575,523.06/3,072.78
  6. Step 6: Final answer
    x = 1,489.05

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Similar ratio
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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.