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Finding the Fourth Proportional to 275,125.75, 379,512.27 and 172,989.34

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Solution

The fourth proportional to 275,125.75, 379,512.27 and 172,989.34 is: 238,623.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,125.75 : 379,512.27 = 172,989.34 : x
  2. Step 2: Convert to fraction form
    275,125.75/379,512.27 = 172,989.34/x
  3. Step 3: Cross multiply
    275,125.75x = 379,512.27 × 172,989.34
  4. Step 4: Simplify right side
    275,125.75x = 65,651,576,160.42
  5. Step 5: Solve for x
    x = 65,651,576,160.42/275,125.75
  6. Step 6: Final answer
    x = 238,623.89

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1.5x scale

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.