Home / 678,870.32-936,736.89-392,335.07

Finding the Fourth Proportional to 678,870.32, 936,736.89 and 392,335.07

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Solution

The fourth proportional to 678,870.32, 936,736.89 and 392,335.07 is: 541,362.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,870.32 : 936,736.89 = 392,335.07 : x
  2. Step 2: Convert to fraction form
    678,870.32/936,736.89 = 392,335.07/x
  3. Step 3: Cross multiply
    678,870.32x = 936,736.89 × 392,335.07
  4. Step 4: Simplify right side
    678,870.32x = 367,514,733,309.73
  5. Step 5: Solve for x
    x = 367,514,733,309.73/678,870.32
  6. Step 6: Final answer
    x = 541,362.20

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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.