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Finding the Fourth Proportional to 4,611.78, 6,912 and 2,011.68

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Solution

The fourth proportional to 4,611.78, 6,912 and 2,011.68 is: 3,015.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,611.78 : 6,912 = 2,011.68 : x
  2. Step 2: Convert to fraction form
    4,611.78/6,912 = 2,011.68/x
  3. Step 3: Cross multiply
    4,611.78x = 6,912 × 2,011.68
  4. Step 4: Simplify right side
    4,611.78x = 13,904,732.16
  5. Step 5: Solve for x
    x = 13,904,732.16/4,611.78
  6. Step 6: Final answer
    x = 3,015.05

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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.