Home / 685,660,208.65-946,179,419.06-388,304,578.69

Finding the Fourth Proportional to 685,660,208.65, 946,179,419.06 and 388,304,578.69

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Solution

The fourth proportional to 685,660,208.65, 946,179,419.06 and 388,304,578.69 is: 535,842,383.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,660,208.65 : 946,179,419.06 = 388,304,578.69 : x
  2. Step 2: Convert to fraction form
    685,660,208.65/946,179,419.06 = 388,304,578.69/x
  3. Step 3: Cross multiply
    685,660,208.65x = 946,179,419.06 × 388,304,578.69
  4. Step 4: Simplify right side
    685,660,208.65x = 367,405,800,681,847,552
  5. Step 5: Solve for x
    x = 367,405,800,681,847,552/685,660,208.65
  6. Step 6: Final answer
    x = 535,842,383.80

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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.