Home / 678,741.12-936,550.35-392,287.86

Finding the Fourth Proportional to 678,741.12, 936,550.35 and 392,287.86

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Solution

The fourth proportional to 678,741.12, 936,550.35 and 392,287.86 is: 541,292.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,741.12 : 936,550.35 = 392,287.86 : x
  2. Step 2: Convert to fraction form
    678,741.12/936,550.35 = 392,287.86/x
  3. Step 3: Cross multiply
    678,741.12x = 936,550.35 × 392,287.86
  4. Step 4: Simplify right side
    678,741.12x = 367,397,332,583.75
  5. Step 5: Solve for x
    x = 367,397,332,583.75/678,741.12
  6. Step 6: Final answer
    x = 541,292.29

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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.