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Finding the Fourth Proportional to 1,278,678.93, 1,764,568.24 and 705,719.10

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Solution

The fourth proportional to 1,278,678.93, 1,764,568.24 and 705,719.10 is: 973,887.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,678.93 : 1,764,568.24 = 705,719.10 : x
  2. Step 2: Convert to fraction form
    1,278,678.93/1,764,568.24 = 705,719.10/x
  3. Step 3: Cross multiply
    1,278,678.93x = 1,764,568.24 × 705,719.10
  4. Step 4: Simplify right side
    1,278,678.93x = 1,245,289,510,221.38
  5. Step 5: Solve for x
    x = 1,245,289,510,221.38/1,278,678.93
  6. Step 6: Final answer
    x = 973,887.57

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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.