Home / 678,865.10-936,729.84-392,329.94

Finding the Fourth Proportional to 678,865.10, 936,729.84 and 392,329.94

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Solution

The fourth proportional to 678,865.10, 936,729.84 and 392,329.94 is: 541,355.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,865.10 : 936,729.84 = 392,329.94 : x
  2. Step 2: Convert to fraction form
    678,865.10/936,729.84 = 392,329.94/x
  3. Step 3: Cross multiply
    678,865.10x = 936,729.84 × 392,329.94
  4. Step 4: Simplify right side
    678,865.10x = 367,507,161,923.41
  5. Step 5: Solve for x
    x = 367,507,161,923.41/678,865.10
  6. Step 6: Final answer
    x = 541,355.21

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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.