Home / 678,865.16-936,729.78-392,329.91

Finding the Fourth Proportional to 678,865.16, 936,729.78 and 392,329.91

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Solution

The fourth proportional to 678,865.16, 936,729.78 and 392,329.91 is: 541,355.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,865.16 : 936,729.78 = 392,329.91 : x
  2. Step 2: Convert to fraction form
    678,865.16/936,729.78 = 392,329.91/x
  3. Step 3: Cross multiply
    678,865.16x = 936,729.78 × 392,329.91
  4. Step 4: Simplify right side
    678,865.16x = 367,507,110,281.72
  5. Step 5: Solve for x
    x = 367,507,110,281.72/678,865.16
  6. Step 6: Final answer
    x = 541,355.09

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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.