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Finding the Fourth Proportional to 872,842.84, 1,205,280 and 643,797.11

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Solution

The fourth proportional to 872,842.84, 1,205,280 and 643,797.11 is: 888,998.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,842.84 : 1,205,280 = 643,797.11 : x
  2. Step 2: Convert to fraction form
    872,842.84/1,205,280 = 643,797.11/x
  3. Step 3: Cross multiply
    872,842.84x = 1,205,280 × 643,797.11
  4. Step 4: Simplify right side
    872,842.84x = 775,955,783,754
  5. Step 5: Solve for x
    x = 775,955,783,754/872,842.84
  6. Step 6: Final answer
    x = 888,998.28

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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.