Home / 678,416.28-936,384.16-392,116.08

Finding the Fourth Proportional to 678,416.28, 936,384.16 and 392,116.08

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Solution

The fourth proportional to 678,416.28, 936,384.16 and 392,116.08 is: 541,218.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,416.28 : 936,384.16 = 392,116.08 : x
  2. Step 2: Convert to fraction form
    678,416.28/936,384.16 = 392,116.08/x
  3. Step 3: Cross multiply
    678,416.28x = 936,384.16 × 392,116.08
  4. Step 4: Simplify right side
    678,416.28x = 367,171,286,193.29
  5. Step 5: Solve for x
    x = 367,171,286,193.29/678,416.28
  6. Step 6: Final answer
    x = 541,218.27

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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.