Home / 419,531,729.72-578,770,120.74-400,080,989

Finding the Fourth Proportional to 419,531,729.72, 578,770,120.74 and 400,080,989

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Solution

The fourth proportional to 419,531,729.72, 578,770,120.74 and 400,080,989 is: 551,936,613.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,531,729.72 : 578,770,120.74 = 400,080,989 : x
  2. Step 2: Convert to fraction form
    419,531,729.72/578,770,120.74 = 400,080,989/x
  3. Step 3: Cross multiply
    419,531,729.72x = 578,770,120.74 × 400,080,989
  4. Step 4: Simplify right side
    419,531,729.72x = 231,554,922,309,308,608
  5. Step 5: Solve for x
    x = 231,554,922,309,308,608/419,531,729.72
  6. Step 6: Final answer
    x = 551,936,613.86

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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.