Home / 279,936,312.80-419,904,469.20-259,528,978.40

Finding the Fourth Proportional to 279,936,312.80, 419,904,469.20 and 259,528,978.40

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Solution

The fourth proportional to 279,936,312.80, 419,904,469.20 and 259,528,978.40 is: 389,293,467.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,936,312.80 : 419,904,469.20 = 259,528,978.40 : x
  2. Step 2: Convert to fraction form
    279,936,312.80/419,904,469.20 = 259,528,978.40/x
  3. Step 3: Cross multiply
    279,936,312.80x = 419,904,469.20 × 259,528,978.40
  4. Step 4: Simplify right side
    279,936,312.80x = 108,977,377,917,070,272
  5. Step 5: Solve for x
    x = 108,977,377,917,070,272/279,936,312.80
  6. Step 6: Final answer
    x = 389,293,467.60

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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.