Home / 678,849.66-936,708.39-392,314.41

Finding the Fourth Proportional to 678,849.66, 936,708.39 and 392,314.41

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Solution

The fourth proportional to 678,849.66, 936,708.39 and 392,314.41 is: 541,333.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,849.66 : 936,708.39 = 392,314.41 : x
  2. Step 2: Convert to fraction form
    678,849.66/936,708.39 = 392,314.41/x
  3. Step 3: Cross multiply
    678,849.66x = 936,708.39 × 392,314.41
  4. Step 4: Simplify right side
    678,849.66x = 367,484,199,364.90
  5. Step 5: Solve for x
    x = 367,484,199,364.90/678,849.66
  6. Step 6: Final answer
    x = 541,333.70

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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.