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Finding the Fourth Proportional to 1,398,773.88, 1,930,304.79 and 786,926.88

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Solution

The fourth proportional to 1,398,773.88, 1,930,304.79 and 786,926.88 is: 1,085,957.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,773.88 : 1,930,304.79 = 786,926.88 : x
  2. Step 2: Convert to fraction form
    1,398,773.88/1,930,304.79 = 786,926.88/x
  3. Step 3: Cross multiply
    1,398,773.88x = 1,930,304.79 × 786,926.88
  4. Step 4: Simplify right side
    1,398,773.88x = 1,519,008,725,843.76
  5. Step 5: Solve for x
    x = 1,519,008,725,843.76/1,398,773.88
  6. Step 6: Final answer
    x = 1,085,957.31

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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.