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Finding the Fourth Proportional to 419,903,999.10, 629,855,998.65 and 256,645,323.90

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Solution

The fourth proportional to 419,903,999.10, 629,855,998.65 and 256,645,323.90 is: 384,967,985.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,903,999.10 : 629,855,998.65 = 256,645,323.90 : x
  2. Step 2: Convert to fraction form
    419,903,999.10/629,855,998.65 = 256,645,323.90/x
  3. Step 3: Cross multiply
    419,903,999.10x = 629,855,998.65 × 256,645,323.90
  4. Step 4: Simplify right side
    419,903,999.10x = 161,649,596,783,887,200
  5. Step 5: Solve for x
    x = 161,649,596,783,887,200/419,903,999.10
  6. Step 6: Final answer
    x = 384,967,985.85

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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.