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Finding the Fourth Proportional to 467,057.75, 643,182.12 and 405,775.58

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Solution

The fourth proportional to 467,057.75, 643,182.12 and 405,775.58 is: 558,790.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    467,057.75 : 643,182.12 = 405,775.58 : x
  2. Step 2: Convert to fraction form
    467,057.75/643,182.12 = 405,775.58/x
  3. Step 3: Cross multiply
    467,057.75x = 643,182.12 × 405,775.58
  4. Step 4: Simplify right side
    467,057.75x = 260,987,594,572.72
  5. Step 5: Solve for x
    x = 260,987,594,572.72/467,057.75
  6. Step 6: Final answer
    x = 558,790.85

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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.