Home / 641,960.07-885,904.83-355,480.20

Finding the Fourth Proportional to 641,960.07, 885,904.83 and 355,480.20

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Solution

The fourth proportional to 641,960.07, 885,904.83 and 355,480.20 is: 490,562.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,960.07 : 885,904.83 = 355,480.20 : x
  2. Step 2: Convert to fraction form
    641,960.07/885,904.83 = 355,480.20/x
  3. Step 3: Cross multiply
    641,960.07x = 885,904.83 × 355,480.20
  4. Step 4: Simplify right side
    641,960.07x = 314,921,626,149.37
  5. Step 5: Solve for x
    x = 314,921,626,149.37/641,960.07
  6. Step 6: Final answer
    x = 490,562.64

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Half scale
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Double scale
Find fourth proportional to 641,961.07, 885,906.21 and 355,481.20
Similar ratio
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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.