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Finding the Fourth Proportional to 667,078.49, 920,568.59 and 361,154.85

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Solution

The fourth proportional to 667,078.49, 920,568.59 and 361,154.85 is: 498,393.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,078.49 : 920,568.59 = 361,154.85 : x
  2. Step 2: Convert to fraction form
    667,078.49/920,568.59 = 361,154.85/x
  3. Step 3: Cross multiply
    667,078.49x = 920,568.59 × 361,154.85
  4. Step 4: Simplify right side
    667,078.49x = 332,467,811,939.05
  5. Step 5: Solve for x
    x = 332,467,811,939.05/667,078.49
  6. Step 6: Final answer
    x = 498,393.85

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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.