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Finding the Fourth Proportional to 621,878.14, 858,181.78 and 349,945.88

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Solution

The fourth proportional to 621,878.14, 858,181.78 and 349,945.88 is: 482,919.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,878.14 : 858,181.78 = 349,945.88 : x
  2. Step 2: Convert to fraction form
    621,878.14/858,181.78 = 349,945.88/x
  3. Step 3: Cross multiply
    621,878.14x = 858,181.78 × 349,945.88
  4. Step 4: Simplify right side
    621,878.14x = 300,317,173,036.29
  5. Step 5: Solve for x
    x = 300,317,173,036.29/621,878.14
  6. Step 6: Final answer
    x = 482,919.65

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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.