Home / 419,904,665.40-629,856,998.10-391,206,851.40

Finding the Fourth Proportional to 419,904,665.40, 629,856,998.10 and 391,206,851.40

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Solution

The fourth proportional to 419,904,665.40, 629,856,998.10 and 391,206,851.40 is: 586,810,277.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,904,665.40 : 629,856,998.10 = 391,206,851.40 : x
  2. Step 2: Convert to fraction form
    419,904,665.40/629,856,998.10 = 391,206,851.40/x
  3. Step 3: Cross multiply
    419,904,665.40x = 629,856,998.10 × 391,206,851.40
  4. Step 4: Simplify right side
    419,904,665.40x = 246,404,373,058,956,768
  5. Step 5: Solve for x
    x = 246,404,373,058,956,768/419,904,665.40
  6. Step 6: Final answer
    x = 586,810,277.10

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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.