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Finding the Fourth Proportional to 525,899.18, 725,791.91 and 311,108.37

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Solution

The fourth proportional to 525,899.18, 725,791.91 and 311,108.37 is: 429,359.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,899.18 : 725,791.91 = 311,108.37 : x
  2. Step 2: Convert to fraction form
    525,899.18/725,791.91 = 311,108.37/x
  3. Step 3: Cross multiply
    525,899.18x = 725,791.91 × 311,108.37
  4. Step 4: Simplify right side
    525,899.18x = 225,799,936,523.75
  5. Step 5: Solve for x
    x = 225,799,936,523.75/525,899.18
  6. Step 6: Final answer
    x = 429,359.75

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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.