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Finding the Fourth Proportional to 1,278,923.72, 1,764,908.60 and 705,958.88

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Solution

The fourth proportional to 1,278,923.72, 1,764,908.60 and 705,958.88 is: 974,219.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,923.72 : 1,764,908.60 = 705,958.88 : x
  2. Step 2: Convert to fraction form
    1,278,923.72/1,764,908.60 = 705,958.88/x
  3. Step 3: Cross multiply
    1,278,923.72x = 1,764,908.60 × 705,958.88
  4. Step 4: Simplify right side
    1,278,923.72x = 1,245,952,898,558.37
  5. Step 5: Solve for x
    x = 1,245,952,898,558.37/1,278,923.72
  6. Step 6: Final answer
    x = 974,219.87

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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.