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Finding the Fourth Proportional to 354,317.60, 530,180.40 and 261,005.60

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Solution

The fourth proportional to 354,317.60, 530,180.40 and 261,005.60 is: 390,553.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,317.60 : 530,180.40 = 261,005.60 : x
  2. Step 2: Convert to fraction form
    354,317.60/530,180.40 = 261,005.60/x
  3. Step 3: Cross multiply
    354,317.60x = 530,180.40 × 261,005.60
  4. Step 4: Simplify right side
    354,317.60x = 138,380,053,410.24
  5. Step 5: Solve for x
    x = 138,380,053,410.24/354,317.60
  6. Step 6: Final answer
    x = 390,553.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.