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Finding the Fourth Proportional to 419,967.60, 629,951.40 and 231,010.80

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Solution

The fourth proportional to 419,967.60, 629,951.40 and 231,010.80 is: 346,516.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,967.60 : 629,951.40 = 231,010.80 : x
  2. Step 2: Convert to fraction form
    419,967.60/629,951.40 = 231,010.80/x
  3. Step 3: Cross multiply
    419,967.60x = 629,951.40 × 231,010.80
  4. Step 4: Simplify right side
    419,967.60x = 145,525,576,875.12
  5. Step 5: Solve for x
    x = 145,525,576,875.12/419,967.60
  6. Step 6: Final answer
    x = 346,516.20

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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.