Home / 419,904,010.40-629,856,015.60-215,830,666.40

Finding the Fourth Proportional to 419,904,010.40, 629,856,015.60 and 215,830,666.40

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Solution

The fourth proportional to 419,904,010.40, 629,856,015.60 and 215,830,666.40 is: 323,745,999.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,904,010.40 : 629,856,015.60 = 215,830,666.40 : x
  2. Step 2: Convert to fraction form
    419,904,010.40/629,856,015.60 = 215,830,666.40/x
  3. Step 3: Cross multiply
    419,904,010.40x = 629,856,015.60 × 215,830,666.40
  4. Step 4: Simplify right side
    419,904,010.40x = 135,942,243,582,996,800
  5. Step 5: Solve for x
    x = 135,942,243,582,996,800/419,904,010.40
  6. Step 6: Final answer
    x = 323,745,999.60

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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.