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Finding the Fourth Proportional to 419,965.60, 629,948.40 and 231,008.80

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Solution

The fourth proportional to 419,965.60, 629,948.40 and 231,008.80 is: 346,513.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,965.60 : 629,948.40 = 231,008.80 : x
  2. Step 2: Convert to fraction form
    419,965.60/629,948.40 = 231,008.80/x
  3. Step 3: Cross multiply
    419,965.60x = 629,948.40 × 231,008.80
  4. Step 4: Simplify right side
    419,965.60x = 145,523,623,945.92
  5. Step 5: Solve for x
    x = 145,523,623,945.92/419,965.60
  6. Step 6: Final answer
    x = 346,513.20

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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.