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Finding the Fourth Proportional to 3,072.68, 4,609.05 and 764.18

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Solution

The fourth proportional to 3,072.68, 4,609.05 and 764.18 is: 1,146.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,072.68 : 4,609.05 = 764.18 : x
  2. Step 2: Convert to fraction form
    3,072.68/4,609.05 = 764.18/x
  3. Step 3: Cross multiply
    3,072.68x = 4,609.05 × 764.18
  4. Step 4: Simplify right side
    3,072.68x = 3,522,143.83
  5. Step 5: Solve for x
    x = 3,522,143.83/3,072.68
  6. Step 6: Final answer
    x = 1,146.28

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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.