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Finding the Fourth Proportional to 1,308,793.89, 1,964,240.73 and 677,888.13

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Solution

The fourth proportional to 1,308,793.89, 1,964,240.73 and 677,888.13 is: 1,017,375.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308,793.89 : 1,964,240.73 = 677,888.13 : x
  2. Step 2: Convert to fraction form
    1,308,793.89/1,964,240.73 = 677,888.13/x
  3. Step 3: Cross multiply
    1,308,793.89x = 1,964,240.73 × 677,888.13
  4. Step 4: Simplify right side
    1,308,793.89x = 1,331,535,475,329.53
  5. Step 5: Solve for x
    x = 1,331,535,475,329.53/1,308,793.89
  6. Step 6: Final answer
    x = 1,017,375.99

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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.