Home / 643,579.82-888,081.45-381,890.03

Finding the Fourth Proportional to 643,579.82, 888,081.45 and 381,890.03

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Solution

The fourth proportional to 643,579.82, 888,081.45 and 381,890.03 is: 526,973.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,579.82 : 888,081.45 = 381,890.03 : x
  2. Step 2: Convert to fraction form
    643,579.82/888,081.45 = 381,890.03/x
  3. Step 3: Cross multiply
    643,579.82x = 888,081.45 × 381,890.03
  4. Step 4: Simplify right side
    643,579.82x = 339,149,455,390.61
  5. Step 5: Solve for x
    x = 339,149,455,390.61/643,579.82
  6. Step 6: Final answer
    x = 526,973.42

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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.