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Finding the Fourth Proportional to 538,907.80, 808,361.70 and 397,190.20

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Solution

The fourth proportional to 538,907.80, 808,361.70 and 397,190.20 is: 595,785.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,907.80 : 808,361.70 = 397,190.20 : x
  2. Step 2: Convert to fraction form
    538,907.80/808,361.70 = 397,190.20/x
  3. Step 3: Cross multiply
    538,907.80x = 808,361.70 × 397,190.20
  4. Step 4: Simplify right side
    538,907.80x = 321,073,345,295.34
  5. Step 5: Solve for x
    x = 321,073,345,295.34/538,907.80
  6. Step 6: Final answer
    x = 595,785.30

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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.