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Finding the Fourth Proportional to 678,766.82, 936,727.65 and 388,469.51

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Solution

The fourth proportional to 678,766.82, 936,727.65 and 388,469.51 is: 536,104.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,766.82 : 936,727.65 = 388,469.51 : x
  2. Step 2: Convert to fraction form
    678,766.82/936,727.65 = 388,469.51/x
  3. Step 3: Cross multiply
    678,766.82x = 936,727.65 × 388,469.51
  4. Step 4: Simplify right side
    678,766.82x = 363,890,126,515.31
  5. Step 5: Solve for x
    x = 363,890,126,515.31/678,766.82
  6. Step 6: Final answer
    x = 536,104.77

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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.