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Finding the Fourth Proportional to 678,262.80, 936,046.92 and 391,794.96

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Solution

The fourth proportional to 678,262.80, 936,046.92 and 391,794.96 is: 540,702.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,262.80 : 936,046.92 = 391,794.96 : x
  2. Step 2: Convert to fraction form
    678,262.80/936,046.92 = 391,794.96/x
  3. Step 3: Cross multiply
    678,262.80x = 936,046.92 × 391,794.96
  4. Step 4: Simplify right side
    678,262.80x = 366,738,465,579.52
  5. Step 5: Solve for x
    x = 366,738,465,579.52/678,262.80
  6. Step 6: Final answer
    x = 540,702.61

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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.