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Finding the Fourth Proportional to 831,760.40, 1,245,797.40 and 644,163.60

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Solution

The fourth proportional to 831,760.40, 1,245,797.40 and 644,163.60 is: 964,817.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,760.40 : 1,245,797.40 = 644,163.60 : x
  2. Step 2: Convert to fraction form
    831,760.40/1,245,797.40 = 644,163.60/x
  3. Step 3: Cross multiply
    831,760.40x = 1,245,797.40 × 644,163.60
  4. Step 4: Simplify right side
    831,760.40x = 802,497,338,054.64
  5. Step 5: Solve for x
    x = 802,497,338,054.64/831,760.40
  6. Step 6: Final answer
    x = 964,817.92

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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.