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Finding the Fourth Proportional to 439,783.80, 606,966.90 and 278,653.94

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Solution

The fourth proportional to 439,783.80, 606,966.90 and 278,653.94 is: 384,583.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,783.80 : 606,966.90 = 278,653.94 : x
  2. Step 2: Convert to fraction form
    439,783.80/606,966.90 = 278,653.94/x
  3. Step 3: Cross multiply
    439,783.80x = 606,966.90 × 278,653.94
  4. Step 4: Simplify right side
    439,783.80x = 169,133,718,134.59
  5. Step 5: Solve for x
    x = 169,133,718,134.59/439,783.80
  6. Step 6: Final answer
    x = 384,583.78

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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.