Home / 985,979.80-1,478,969.70-321,131.80

Finding the Fourth Proportional to 985,979.80, 1,478,969.70 and 321,131.80

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Solution

The fourth proportional to 985,979.80, 1,478,969.70 and 321,131.80 is: 481,697.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,979.80 : 1,478,969.70 = 321,131.80 : x
  2. Step 2: Convert to fraction form
    985,979.80/1,478,969.70 = 321,131.80/x
  3. Step 3: Cross multiply
    985,979.80x = 1,478,969.70 × 321,131.80
  4. Step 4: Simplify right side
    985,979.80x = 474,944,201,906.46
  5. Step 5: Solve for x
    x = 474,944,201,906.46/985,979.80
  6. Step 6: Final answer
    x = 481,697.70

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Double scale
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Similar ratio
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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.