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Finding the Fourth Proportional to 641,714.89, 885,573.11 and 355,228.83

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Solution

The fourth proportional to 641,714.89, 885,573.11 and 355,228.83 is: 490,219.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,714.89 : 885,573.11 = 355,228.83 : x
  2. Step 2: Convert to fraction form
    641,714.89/885,573.11 = 355,228.83/x
  3. Step 3: Cross multiply
    641,714.89x = 885,573.11 × 355,228.83
  4. Step 4: Simplify right side
    641,714.89x = 314,581,099,744.76
  5. Step 5: Solve for x
    x = 314,581,099,744.76/641,714.89
  6. Step 6: Final answer
    x = 490,219.42

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1.5x scale

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.