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Finding the Fourth Proportional to 639,592.92, 882,639.54 and 353,113.56

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Solution

The fourth proportional to 639,592.92, 882,639.54 and 353,113.56 is: 487,297.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,592.92 : 882,639.54 = 353,113.56 : x
  2. Step 2: Convert to fraction form
    639,592.92/882,639.54 = 353,113.56/x
  3. Step 3: Cross multiply
    639,592.92x = 882,639.54 × 353,113.56
  4. Step 4: Simplify right side
    639,592.92x = 311,671,990,166.16
  5. Step 5: Solve for x
    x = 311,671,990,166.16/639,592.92
  6. Step 6: Final answer
    x = 487,297.44

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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.