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Finding the Fourth Proportional to 485,969.75, 670,638.55 and 271,109.82

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Solution

The fourth proportional to 485,969.75, 670,638.55 and 271,109.82 is: 374,131.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,969.75 : 670,638.55 = 271,109.82 : x
  2. Step 2: Convert to fraction form
    485,969.75/670,638.55 = 271,109.82/x
  3. Step 3: Cross multiply
    485,969.75x = 670,638.55 × 271,109.82
  4. Step 4: Simplify right side
    485,969.75x = 181,816,694,798.14
  5. Step 5: Solve for x
    x = 181,816,694,798.14/485,969.75
  6. Step 6: Final answer
    x = 374,131.71

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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.