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Finding the Fourth Proportional to 4,881.14, 7,321.70 and 1,961.48

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Solution

The fourth proportional to 4,881.14, 7,321.70 and 1,961.48 is: 2,942.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,881.14 : 7,321.70 = 1,961.48 : x
  2. Step 2: Convert to fraction form
    4,881.14/7,321.70 = 1,961.48/x
  3. Step 3: Cross multiply
    4,881.14x = 7,321.70 × 1,961.48
  4. Step 4: Simplify right side
    4,881.14x = 14,361,368.12
  5. Step 5: Solve for x
    x = 14,361,368.12/4,881.14
  6. Step 6: Final answer
    x = 2,942.22

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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.