Home / 678,852.42-936,984.69-392,331.12

Finding the Fourth Proportional to 678,852.42, 936,984.69 and 392,331.12

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Solution

The fourth proportional to 678,852.42, 936,984.69 and 392,331.12 is: 541,514.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,852.42 : 936,984.69 = 392,331.12 : x
  2. Step 2: Convert to fraction form
    678,852.42/936,984.69 = 392,331.12/x
  3. Step 3: Cross multiply
    678,852.42x = 936,984.69 × 392,331.12
  4. Step 4: Simplify right side
    678,852.42x = 367,608,252,850.55
  5. Step 5: Solve for x
    x = 367,608,252,850.55/678,852.42
  6. Step 6: Final answer
    x = 541,514.24

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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.