Home / 678,719.28-936,528.30-392,183.76

Finding the Fourth Proportional to 678,719.28, 936,528.30 and 392,183.76

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Solution

The fourth proportional to 678,719.28, 936,528.30 and 392,183.76 is: 541,153.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,719.28 : 936,528.30 = 392,183.76 : x
  2. Step 2: Convert to fraction form
    678,719.28/936,528.30 = 392,183.76/x
  3. Step 3: Cross multiply
    678,719.28x = 936,528.30 × 392,183.76
  4. Step 4: Simplify right side
    678,719.28x = 367,291,190,040.41
  5. Step 5: Solve for x
    x = 367,291,190,040.41/678,719.28
  6. Step 6: Final answer
    x = 541,153.32

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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.