Home / 641,140.94-961,661.50-261,960.71

Finding the Fourth Proportional to 641,140.94, 961,661.50 and 261,960.71

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Solution

The fourth proportional to 641,140.94, 961,661.50 and 261,960.71 is: 392,920.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,140.94 : 961,661.50 = 261,960.71 : x
  2. Step 2: Convert to fraction form
    641,140.94/961,661.50 = 261,960.71/x
  3. Step 3: Cross multiply
    641,140.94x = 961,661.50 × 261,960.71
  4. Step 4: Simplify right side
    641,140.94x = 251,917,523,856.46
  5. Step 5: Solve for x
    x = 251,917,523,856.46/641,140.94
  6. Step 6: Final answer
    x = 392,920.66

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Double scale
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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.