Home / 855,556.94-1,180,758.39-640,320.50

Finding the Fourth Proportional to 855,556.94, 1,180,758.39 and 640,320.50

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Solution

The fourth proportional to 855,556.94, 1,180,758.39 and 640,320.50 is: 883,709.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,556.94 : 1,180,758.39 = 640,320.50 : x
  2. Step 2: Convert to fraction form
    855,556.94/1,180,758.39 = 640,320.50/x
  3. Step 3: Cross multiply
    855,556.94x = 1,180,758.39 × 640,320.50
  4. Step 4: Simplify right side
    855,556.94x = 756,063,802,664.00
  5. Step 5: Solve for x
    x = 756,063,802,664.00/855,556.94
  6. Step 6: Final answer
    x = 883,709.51

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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.