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Finding the Fourth Proportional to 697,891.44, 963,013.68 and 391,905.84

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Solution

The fourth proportional to 697,891.44, 963,013.68 and 391,905.84 is: 540,787.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,891.44 : 963,013.68 = 391,905.84 : x
  2. Step 2: Convert to fraction form
    697,891.44/963,013.68 = 391,905.84/x
  3. Step 3: Cross multiply
    697,891.44x = 963,013.68 × 391,905.84
  4. Step 4: Simplify right side
    697,891.44x = 377,410,685,191.89
  5. Step 5: Solve for x
    x = 377,410,685,191.89/697,891.44
  6. Step 6: Final answer
    x = 540,787.10

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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.