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Finding the Fourth Proportional to 5,318,912.75, 7,978,369.31 and 1,329,824.75

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Solution

The fourth proportional to 5,318,912.75, 7,978,369.31 and 1,329,824.75 is: 1,994,737.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318,912.75 : 7,978,369.31 = 1,329,824.75 : x
  2. Step 2: Convert to fraction form
    5,318,912.75/7,978,369.31 = 1,329,824.75/x
  3. Step 3: Cross multiply
    5,318,912.75x = 7,978,369.31 × 1,329,824.75
  4. Step 4: Simplify right side
    5,318,912.75x = 10,609,832,966,429.30
  5. Step 5: Solve for x
    x = 10,609,832,966,429.30/5,318,912.75
  6. Step 6: Final answer
    x = 1,994,737.17

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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.