Home / 419,531,728.72-578,770,119.36-400,080,988

Finding the Fourth Proportional to 419,531,728.72, 578,770,119.36 and 400,080,988

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Solution

The fourth proportional to 419,531,728.72, 578,770,119.36 and 400,080,988 is: 551,936,612.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,531,728.72 : 578,770,119.36 = 400,080,988 : x
  2. Step 2: Convert to fraction form
    419,531,728.72/578,770,119.36 = 400,080,988/x
  3. Step 3: Cross multiply
    419,531,728.72x = 578,770,119.36 × 400,080,988
  4. Step 4: Simplify right side
    419,531,728.72x = 231,554,921,178,426,720
  5. Step 5: Solve for x
    x = 231,554,921,178,426,720/419,531,728.72
  6. Step 6: Final answer
    x = 551,936,612.48

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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.