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Finding the Fourth Proportional to 275,120.98, 379,505.73 and 172,984.59

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Solution

The fourth proportional to 275,120.98, 379,505.73 and 172,984.59 is: 238,617.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,120.98 : 379,505.73 = 172,984.59 : x
  2. Step 2: Convert to fraction form
    275,120.98/379,505.73 = 172,984.59/x
  3. Step 3: Cross multiply
    275,120.98x = 379,505.73 × 172,984.59
  4. Step 4: Simplify right side
    275,120.98x = 65,648,643,106.70
  5. Step 5: Solve for x
    x = 65,648,643,106.70/275,120.98
  6. Step 6: Final answer
    x = 238,617.36

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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.