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Finding the Fourth Proportional to 691,984.64, 954,917.15 and 405,695.40

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Solution

The fourth proportional to 691,984.64, 954,917.15 and 405,695.40 is: 559,846.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,984.64 : 954,917.15 = 405,695.40 : x
  2. Step 2: Convert to fraction form
    691,984.64/954,917.15 = 405,695.40/x
  3. Step 3: Cross multiply
    691,984.64x = 954,917.15 × 405,695.40
  4. Step 4: Simplify right side
    691,984.64x = 387,405,493,107.63
  5. Step 5: Solve for x
    x = 387,405,493,107.63/691,984.64
  6. Step 6: Final answer
    x = 559,846.96

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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.