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Finding the Fourth Proportional to 257,177.97, 355,028.67 and 171,279.90

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Solution

The fourth proportional to 257,177.97, 355,028.67 and 171,279.90 is: 236,448.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,177.97 : 355,028.67 = 171,279.90 : x
  2. Step 2: Convert to fraction form
    257,177.97/355,028.67 = 171,279.90/x
  3. Step 3: Cross multiply
    257,177.97x = 355,028.67 × 171,279.90
  4. Step 4: Simplify right side
    257,177.97x = 60,809,275,094.73
  5. Step 5: Solve for x
    x = 60,809,275,094.73/257,177.97
  6. Step 6: Final answer
    x = 236,448.23

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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.