Home / 678,923.68-936,810.48-392,388.16

Finding the Fourth Proportional to 678,923.68, 936,810.48 and 392,388.16

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Solution

The fourth proportional to 678,923.68, 936,810.48 and 392,388.16 is: 541,435.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,923.68 : 936,810.48 = 392,388.16 : x
  2. Step 2: Convert to fraction form
    678,923.68/936,810.48 = 392,388.16/x
  3. Step 3: Cross multiply
    678,923.68x = 936,810.48 × 392,388.16
  4. Step 4: Simplify right side
    678,923.68x = 367,593,340,515.92
  5. Step 5: Solve for x
    x = 367,593,340,515.92/678,923.68
  6. Step 6: Final answer
    x = 541,435.44

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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.