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Finding the Fourth Proportional to 639,384.10, 881,808.33 and 384,687.70

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Solution

The fourth proportional to 639,384.10, 881,808.33 and 384,687.70 is: 530,543.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,384.10 : 881,808.33 = 384,687.70 : x
  2. Step 2: Convert to fraction form
    639,384.10/881,808.33 = 384,687.70/x
  3. Step 3: Cross multiply
    639,384.10x = 881,808.33 × 384,687.70
  4. Step 4: Simplify right side
    639,384.10x = 339,220,818,308.54
  5. Step 5: Solve for x
    x = 339,220,818,308.54/639,384.10
  6. Step 6: Final answer
    x = 530,543.09

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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.