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Finding the Fourth Proportional to 419,799.60, 629,699.40 and 397,054.80

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Solution

The fourth proportional to 419,799.60, 629,699.40 and 397,054.80 is: 595,582.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,799.60 : 629,699.40 = 397,054.80 : x
  2. Step 2: Convert to fraction form
    419,799.60/629,699.40 = 397,054.80/x
  3. Step 3: Cross multiply
    419,799.60x = 629,699.40 × 397,054.80
  4. Step 4: Simplify right side
    419,799.60x = 250,025,169,327.12
  5. Step 5: Solve for x
    x = 250,025,169,327.12/419,799.60
  6. Step 6: Final answer
    x = 595,582.20

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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.