Home / 830,135.61-1,245,203.75-640,872.30

Finding the Fourth Proportional to 830,135.61, 1,245,203.75 and 640,872.30

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Solution

The fourth proportional to 830,135.61, 1,245,203.75 and 640,872.30 is: 961,308.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,135.61 : 1,245,203.75 = 640,872.30 : x
  2. Step 2: Convert to fraction form
    830,135.61/1,245,203.75 = 640,872.30/x
  3. Step 3: Cross multiply
    830,135.61x = 1,245,203.75 × 640,872.30
  4. Step 4: Simplify right side
    830,135.61x = 798,016,591,231.13
  5. Step 5: Solve for x
    x = 798,016,591,231.13/830,135.61
  6. Step 6: Final answer
    x = 961,308.71

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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.