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Finding the Fourth Proportional to 1,278,957.62, 1,764,975.68 and 705,998.45

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Solution

The fourth proportional to 1,278,957.62, 1,764,975.68 and 705,998.45 is: 974,285.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,957.62 : 1,764,975.68 = 705,998.45 : x
  2. Step 2: Convert to fraction form
    1,278,957.62/1,764,975.68 = 705,998.45/x
  3. Step 3: Cross multiply
    1,278,957.62x = 1,764,975.68 × 705,998.45
  4. Step 4: Simplify right side
    1,278,957.62x = 1,246,070,082,012.83
  5. Step 5: Solve for x
    x = 1,246,070,082,012.83/1,278,957.62
  6. Step 6: Final answer
    x = 974,285.67

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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.