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Finding the Fourth Proportional to 678,367.53, 936,161.82 and 388,005.63

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Solution

The fourth proportional to 678,367.53, 936,161.82 and 388,005.63 is: 535,456.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,367.53 : 936,161.82 = 388,005.63 : x
  2. Step 2: Convert to fraction form
    678,367.53/936,161.82 = 388,005.63/x
  3. Step 3: Cross multiply
    678,367.53x = 936,161.82 × 388,005.63
  4. Step 4: Simplify right side
    678,367.53x = 363,236,056,751.05
  5. Step 5: Solve for x
    x = 363,236,056,751.05/678,367.53
  6. Step 6: Final answer
    x = 535,456.14

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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.