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Finding the Fourth Proportional to 538,966.80, 808,450.20 and 397,249.20

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Solution

The fourth proportional to 538,966.80, 808,450.20 and 397,249.20 is: 595,873.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,966.80 : 808,450.20 = 397,249.20 : x
  2. Step 2: Convert to fraction form
    538,966.80/808,450.20 = 397,249.20/x
  3. Step 3: Cross multiply
    538,966.80x = 808,450.20 × 397,249.20
  4. Step 4: Simplify right side
    538,966.80x = 321,156,195,189.84
  5. Step 5: Solve for x
    x = 321,156,195,189.84/538,966.80
  6. Step 6: Final answer
    x = 595,873.80

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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.