Home / 715,918.92-987,947.22-393,628.68

Finding the Fourth Proportional to 715,918.92, 987,947.22 and 393,628.68

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Solution

The fourth proportional to 715,918.92, 987,947.22 and 393,628.68 is: 543,196.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,918.92 : 987,947.22 = 393,628.68 : x
  2. Step 2: Convert to fraction form
    715,918.92/987,947.22 = 393,628.68/x
  3. Step 3: Cross multiply
    715,918.92x = 987,947.22 × 393,628.68
  4. Step 4: Simplify right side
    715,918.92x = 388,884,360,118.27
  5. Step 5: Solve for x
    x = 388,884,360,118.27/715,918.92
  6. Step 6: Final answer
    x = 543,196.09

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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.