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Finding the Fourth Proportional to 419,936,618.60, 629,904,927.90 and 266,692,653.80

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Solution

The fourth proportional to 419,936,618.60, 629,904,927.90 and 266,692,653.80 is: 400,038,980.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,936,618.60 : 629,904,927.90 = 266,692,653.80 : x
  2. Step 2: Convert to fraction form
    419,936,618.60/629,904,927.90 = 266,692,653.80/x
  3. Step 3: Cross multiply
    419,936,618.60x = 629,904,927.90 × 266,692,653.80
  4. Step 4: Simplify right side
    419,936,618.60x = 167,991,016,863,348,672
  5. Step 5: Solve for x
    x = 167,991,016,863,348,672/419,936,618.60
  6. Step 6: Final answer
    x = 400,038,980.70

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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.