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Finding the Fourth Proportional to 275,126.90, 379,513.80 and 172,990.49

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Solution

The fourth proportional to 275,126.90, 379,513.80 and 172,990.49 is: 238,625.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,126.90 : 379,513.80 = 172,990.49 : x
  2. Step 2: Convert to fraction form
    275,126.90/379,513.80 = 172,990.49/x
  3. Step 3: Cross multiply
    275,126.90x = 379,513.80 × 172,990.49
  4. Step 4: Simplify right side
    275,126.90x = 65,652,276,326.19
  5. Step 5: Solve for x
    x = 65,652,276,326.19/275,126.90
  6. Step 6: Final answer
    x = 238,625.44

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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.