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Finding the Fourth Proportional to 878,019.84, 1,211,757.12 and 633,206.88

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Solution

The fourth proportional to 878,019.84, 1,211,757.12 and 633,206.88 is: 873,890.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,019.84 : 1,211,757.12 = 633,206.88 : x
  2. Step 2: Convert to fraction form
    878,019.84/1,211,757.12 = 633,206.88/x
  3. Step 3: Cross multiply
    878,019.84x = 1,211,757.12 × 633,206.88
  4. Step 4: Simplify right side
    878,019.84x = 767,292,945,272.99
  5. Step 5: Solve for x
    x = 767,292,945,272.99/878,019.84
  6. Step 6: Final answer
    x = 873,890.21

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1.5x scale

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.