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Finding the Fourth Proportional to 698,775.76, 964,213.32 and 392,808.88

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Solution

The fourth proportional to 698,775.76, 964,213.32 and 392,808.88 is: 542,021.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,775.76 : 964,213.32 = 392,808.88 : x
  2. Step 2: Convert to fraction form
    698,775.76/964,213.32 = 392,808.88/x
  3. Step 3: Cross multiply
    698,775.76x = 964,213.32 × 392,808.88
  4. Step 4: Simplify right side
    698,775.76x = 378,751,554,310.28
  5. Step 5: Solve for x
    x = 378,751,554,310.28/698,775.76
  6. Step 6: Final answer
    x = 542,021.60

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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.