Home / 419,905,812.80-629,858,719.20-315,601,659.20

Finding the Fourth Proportional to 419,905,812.80, 629,858,719.20 and 315,601,659.20

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Solution

The fourth proportional to 419,905,812.80, 629,858,719.20 and 315,601,659.20 is: 473,402,488.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,905,812.80 : 629,858,719.20 = 315,601,659.20 : x
  2. Step 2: Convert to fraction form
    419,905,812.80/629,858,719.20 = 315,601,659.20/x
  3. Step 3: Cross multiply
    419,905,812.80x = 629,858,719.20 × 315,601,659.20
  4. Step 4: Simplify right side
    419,905,812.80x = 198,784,456,841,106,912
  5. Step 5: Solve for x
    x = 198,784,456,841,106,912/419,905,812.80
  6. Step 6: Final answer
    x = 473,402,488.80

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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.