Home / 856,171.40-1,182,310.74-640,937.80

Finding the Fourth Proportional to 856,171.40, 1,182,310.74 and 640,937.80

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Solution

The fourth proportional to 856,171.40, 1,182,310.74 and 640,937.80 is: 885,088.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,171.40 : 1,182,310.74 = 640,937.80 : x
  2. Step 2: Convert to fraction form
    856,171.40/1,182,310.74 = 640,937.80/x
  3. Step 3: Cross multiply
    856,171.40x = 1,182,310.74 × 640,937.80
  4. Step 4: Simplify right side
    856,171.40x = 757,787,644,611.97
  5. Step 5: Solve for x
    x = 757,787,644,611.97/856,171.40
  6. Step 6: Final answer
    x = 885,088.72

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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.