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Finding the Fourth Proportional to 1,370,822.88, 1,891,483.46 and 789,964.56

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Solution

The fourth proportional to 1,370,822.88, 1,891,483.46 and 789,964.56 is: 1,090,005.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370,822.88 : 1,891,483.46 = 789,964.56 : x
  2. Step 2: Convert to fraction form
    1,370,822.88/1,891,483.46 = 789,964.56/x
  3. Step 3: Cross multiply
    1,370,822.88x = 1,891,483.46 × 789,964.56
  4. Step 4: Simplify right side
    1,370,822.88x = 1,494,204,895,276.36
  5. Step 5: Solve for x
    x = 1,494,204,895,276.36/1,370,822.88
  6. Step 6: Final answer
    x = 1,090,005.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.