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Finding the Fourth Proportional to 715,793.12, 987,813.36 and 393,511.34

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Solution

The fourth proportional to 715,793.12, 987,813.36 and 393,511.34 is: 543,056.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,793.12 : 987,813.36 = 393,511.34 : x
  2. Step 2: Convert to fraction form
    715,793.12/987,813.36 = 393,511.34/x
  3. Step 3: Cross multiply
    715,793.12x = 987,813.36 × 393,511.34
  4. Step 4: Simplify right side
    715,793.12x = 388,715,752,056.88
  5. Step 5: Solve for x
    x = 388,715,752,056.88/715,793.12
  6. Step 6: Final answer
    x = 543,056.00

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1.5x scale

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.