Home / 678,637.82-936,251.78-392,105.18

Finding the Fourth Proportional to 678,637.82, 936,251.78 and 392,105.18

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Solution

The fourth proportional to 678,637.82, 936,251.78 and 392,105.18 is: 540,950.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,637.82 : 936,251.78 = 392,105.18 : x
  2. Step 2: Convert to fraction form
    678,637.82/936,251.78 = 392,105.18/x
  3. Step 3: Cross multiply
    678,637.82x = 936,251.78 × 392,105.18
  4. Step 4: Simplify right side
    678,637.82x = 367,109,172,722.22
  5. Step 5: Solve for x
    x = 367,109,172,722.22/678,637.82
  6. Step 6: Final answer
    x = 540,950.06

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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.