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Finding the Fourth Proportional to 678,310.80, 936,072.48 and 423,809.56

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Solution

The fourth proportional to 678,310.80, 936,072.48 and 423,809.56 is: 584,859.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,310.80 : 936,072.48 = 423,809.56 : x
  2. Step 2: Convert to fraction form
    678,310.80/936,072.48 = 423,809.56/x
  3. Step 3: Cross multiply
    678,310.80x = 936,072.48 × 423,809.56
  4. Step 4: Simplify right side
    678,310.80x = 396,716,465,876.91
  5. Step 5: Solve for x
    x = 396,716,465,876.91/678,310.80
  6. Step 6: Final answer
    x = 584,859.43

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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.