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Finding the Fourth Proportional to 253,146.80, 379,259.40 and 206,145.20

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Solution

The fourth proportional to 253,146.80, 379,259.40 and 206,145.20 is: 308,842.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,146.80 : 379,259.40 = 206,145.20 : x
  2. Step 2: Convert to fraction form
    253,146.80/379,259.40 = 206,145.20/x
  3. Step 3: Cross multiply
    253,146.80x = 379,259.40 × 206,145.20
  4. Step 4: Simplify right side
    253,146.80x = 78,182,504,864.88
  5. Step 5: Solve for x
    x = 78,182,504,864.88/253,146.80
  6. Step 6: Final answer
    x = 308,842.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.