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Finding the Fourth Proportional to 639,096.84, 881,980.32 and 352,635.48

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Solution

The fourth proportional to 639,096.84, 881,980.32 and 352,635.48 is: 486,651.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,096.84 : 881,980.32 = 352,635.48 : x
  2. Step 2: Convert to fraction form
    639,096.84/881,980.32 = 352,635.48/x
  3. Step 3: Cross multiply
    639,096.84x = 881,980.32 × 352,635.48
  4. Step 4: Simplify right side
    639,096.84x = 311,017,553,493.75
  5. Step 5: Solve for x
    x = 311,017,553,493.75/639,096.84
  6. Step 6: Final answer
    x = 486,651.68

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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.