Home / 715,826.50-987,815.39-393,534.26

Finding the Fourth Proportional to 715,826.50, 987,815.39 and 393,534.26

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Solution

The fourth proportional to 715,826.50, 987,815.39 and 393,534.26 is: 543,063.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,826.50 : 987,815.39 = 393,534.26 : x
  2. Step 2: Convert to fraction form
    715,826.50/987,815.39 = 393,534.26/x
  3. Step 3: Cross multiply
    715,826.50x = 987,815.39 × 393,534.26
  4. Step 4: Simplify right side
    715,826.50x = 388,739,198,520.26
  5. Step 5: Solve for x
    x = 388,739,198,520.26/715,826.50
  6. Step 6: Final answer
    x = 543,063.44

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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.