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Finding the Fourth Proportional to 652,382.10, 978,573.15 and 439,805.70

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Solution

The fourth proportional to 652,382.10, 978,573.15 and 439,805.70 is: 659,708.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,382.10 : 978,573.15 = 439,805.70 : x
  2. Step 2: Convert to fraction form
    652,382.10/978,573.15 = 439,805.70/x
  3. Step 3: Cross multiply
    652,382.10x = 978,573.15 × 439,805.70
  4. Step 4: Simplify right side
    652,382.10x = 430,382,049,236.96
  5. Step 5: Solve for x
    x = 430,382,049,236.96/652,382.10
  6. Step 6: Final answer
    x = 659,708.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.