Home / 420,126,470.72-579,775,331.88-231,955,128.60

Finding the Fourth Proportional to 420,126,470.72, 579,775,331.88 and 231,955,128.60

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Solution

The fourth proportional to 420,126,470.72, 579,775,331.88 and 231,955,128.60 is: 320,098,520.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,126,470.72 : 579,775,331.88 = 231,955,128.60 : x
  2. Step 2: Convert to fraction form
    420,126,470.72/579,775,331.88 = 231,955,128.60/x
  3. Step 3: Cross multiply
    420,126,470.72x = 579,775,331.88 × 231,955,128.60
  4. Step 4: Simplify right side
    420,126,470.72x = 134,481,861,665,333,072
  5. Step 5: Solve for x
    x = 134,481,861,665,333,072/420,126,470.72
  6. Step 6: Final answer
    x = 320,098,520.42

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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.