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Finding the Fourth Proportional to 364,021.20, 546,031.80 and 206,557.20

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Solution

The fourth proportional to 364,021.20, 546,031.80 and 206,557.20 is: 309,835.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    364,021.20 : 546,031.80 = 206,557.20 : x
  2. Step 2: Convert to fraction form
    364,021.20/546,031.80 = 206,557.20/x
  3. Step 3: Cross multiply
    364,021.20x = 546,031.80 × 206,557.20
  4. Step 4: Simplify right side
    364,021.20x = 112,786,799,718.96
  5. Step 5: Solve for x
    x = 112,786,799,718.96/364,021.20
  6. Step 6: Final answer
    x = 309,835.80

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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.