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Finding the Fourth Proportional to 430,676.69, 645,539.31 and 177,817.78

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Solution

The fourth proportional to 430,676.69, 645,539.31 and 177,817.78 is: 266,530.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,676.69 : 645,539.31 = 177,817.78 : x
  2. Step 2: Convert to fraction form
    430,676.69/645,539.31 = 177,817.78/x
  3. Step 3: Cross multiply
    430,676.69x = 645,539.31 × 177,817.78
  4. Step 4: Simplify right side
    430,676.69x = 114,788,367,006.93
  5. Step 5: Solve for x
    x = 114,788,367,006.93/430,676.69
  6. Step 6: Final answer
    x = 266,530.25

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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.