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Finding the Fourth Proportional to 538,906.80, 808,360.20 and 397,189.20

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Solution

The fourth proportional to 538,906.80, 808,360.20 and 397,189.20 is: 595,783.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,906.80 : 808,360.20 = 397,189.20 : x
  2. Step 2: Convert to fraction form
    538,906.80/808,360.20 = 397,189.20/x
  3. Step 3: Cross multiply
    538,906.80x = 808,360.20 × 397,189.20
  4. Step 4: Simplify right side
    538,906.80x = 321,071,941,149.84
  5. Step 5: Solve for x
    x = 321,071,941,149.84/538,906.80
  6. Step 6: Final answer
    x = 595,783.80

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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.