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Finding the Fourth Proportional to 1,278,815.28, 1,764,765.24 and 705,855.60

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Solution

The fourth proportional to 1,278,815.28, 1,764,765.24 and 705,855.60 is: 974,080.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,815.28 : 1,764,765.24 = 705,855.60 : x
  2. Step 2: Convert to fraction form
    1,278,815.28/1,764,765.24 = 705,855.60/x
  3. Step 3: Cross multiply
    1,278,815.28x = 1,764,765.24 × 705,855.60
  4. Step 4: Simplify right side
    1,278,815.28x = 1,245,669,427,339.34
  5. Step 5: Solve for x
    x = 1,245,669,427,339.34/1,278,815.28
  6. Step 6: Final answer
    x = 974,080.81

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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.