Home / 643,584.34-888,087.67-381,894.55

Finding the Fourth Proportional to 643,584.34, 888,087.67 and 381,894.55

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Solution

The fourth proportional to 643,584.34, 888,087.67 and 381,894.55 is: 526,979.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,584.34 : 888,087.67 = 381,894.55 : x
  2. Step 2: Convert to fraction form
    643,584.34/888,087.67 = 381,894.55/x
  3. Step 3: Cross multiply
    643,584.34x = 888,087.67 × 381,894.55
  4. Step 4: Simplify right side
    643,584.34x = 339,155,837,920.24
  5. Step 5: Solve for x
    x = 339,155,837,920.24/643,584.34
  6. Step 6: Final answer
    x = 526,979.63

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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.