Home / 678,367.03-936,161.13-388,005.13

Finding the Fourth Proportional to 678,367.03, 936,161.13 and 388,005.13

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Solution

The fourth proportional to 678,367.03, 936,161.13 and 388,005.13 is: 535,455.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,367.03 : 936,161.13 = 388,005.13 : x
  2. Step 2: Convert to fraction form
    678,367.03/936,161.13 = 388,005.13/x
  3. Step 3: Cross multiply
    678,367.03x = 936,161.13 × 388,005.13
  4. Step 4: Simplify right side
    678,367.03x = 363,235,320,946.60
  5. Step 5: Solve for x
    x = 363,235,320,946.60/678,367.03
  6. Step 6: Final answer
    x = 535,455.45

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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.