Home / 419,904,920.40-629,857,380.60-391,207,106.40

Finding the Fourth Proportional to 419,904,920.40, 629,857,380.60 and 391,207,106.40

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Solution

The fourth proportional to 419,904,920.40, 629,857,380.60 and 391,207,106.40 is: 586,810,659.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,904,920.40 : 629,857,380.60 = 391,207,106.40 : x
  2. Step 2: Convert to fraction form
    419,904,920.40/629,857,380.60 = 391,207,106.40/x
  3. Step 3: Cross multiply
    419,904,920.40x = 629,857,380.60 × 391,207,106.40
  4. Step 4: Simplify right side
    419,904,920.40x = 246,404,683,309,209,504
  5. Step 5: Solve for x
    x = 246,404,683,309,209,504/419,904,920.40
  6. Step 6: Final answer
    x = 586,810,659.60

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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.