Home / 678,716.28-936,524.16-392,180.76

Finding the Fourth Proportional to 678,716.28, 936,524.16 and 392,180.76

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Solution

The fourth proportional to 678,716.28, 936,524.16 and 392,180.76 is: 541,149.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,716.28 : 936,524.16 = 392,180.76 : x
  2. Step 2: Convert to fraction form
    678,716.28/936,524.16 = 392,180.76/x
  3. Step 3: Cross multiply
    678,716.28x = 936,524.16 × 392,180.76
  4. Step 4: Simplify right side
    678,716.28x = 367,286,756,827.16
  5. Step 5: Solve for x
    x = 367,286,756,827.16/678,716.28
  6. Step 6: Final answer
    x = 541,149.18

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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.