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Finding the Fourth Proportional to 1,369,995.80, 1,890,591.54 and 766,383.80

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Solution

The fourth proportional to 1,369,995.80, 1,890,591.54 and 766,383.80 is: 1,057,608.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369,995.80 : 1,890,591.54 = 766,383.80 : x
  2. Step 2: Convert to fraction form
    1,369,995.80/1,890,591.54 = 766,383.80/x
  3. Step 3: Cross multiply
    1,369,995.80x = 1,890,591.54 × 766,383.80
  4. Step 4: Simplify right side
    1,369,995.80x = 1,448,918,728,673.05
  5. Step 5: Solve for x
    x = 1,448,918,728,673.05/1,369,995.80
  6. Step 6: Final answer
    x = 1,057,608.15

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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.