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Finding the Fourth Proportional to 436,561.20, 653,529.60 and 258,976.80

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Solution

The fourth proportional to 436,561.20, 653,529.60 and 258,976.80 is: 387,686.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,561.20 : 653,529.60 = 258,976.80 : x
  2. Step 2: Convert to fraction form
    436,561.20/653,529.60 = 258,976.80/x
  3. Step 3: Cross multiply
    436,561.20x = 653,529.60 × 258,976.80
  4. Step 4: Simplify right side
    436,561.20x = 169,249,004,513.28
  5. Step 5: Solve for x
    x = 169,249,004,513.28/436,561.20
  6. Step 6: Final answer
    x = 387,686.78

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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.