Home / 678,922.68-936,809.10-392,387.16

Finding the Fourth Proportional to 678,922.68, 936,809.10 and 392,387.16

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Solution

The fourth proportional to 678,922.68, 936,809.10 and 392,387.16 is: 541,434.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,922.68 : 936,809.10 = 392,387.16 : x
  2. Step 2: Convert to fraction form
    678,922.68/936,809.10 = 392,387.16/x
  3. Step 3: Cross multiply
    678,922.68x = 936,809.10 × 392,387.16
  4. Step 4: Simplify right side
    678,922.68x = 367,591,862,211.16
  5. Step 5: Solve for x
    x = 367,591,862,211.16/678,922.68
  6. Step 6: Final answer
    x = 541,434.06

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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.