Home / 279,936,346.40-419,904,519.60-172,291,623.20

Finding the Fourth Proportional to 279,936,346.40, 419,904,519.60 and 172,291,623.20

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Solution

The fourth proportional to 279,936,346.40, 419,904,519.60 and 172,291,623.20 is: 258,437,434.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,936,346.40 : 419,904,519.60 = 172,291,623.20 : x
  2. Step 2: Convert to fraction form
    279,936,346.40/419,904,519.60 = 172,291,623.20/x
  3. Step 3: Cross multiply
    279,936,346.40x = 419,904,519.60 × 172,291,623.20
  4. Step 4: Simplify right side
    279,936,346.40x = 72,346,031,270,900,208
  5. Step 5: Solve for x
    x = 72,346,031,270,900,208/279,936,346.40
  6. Step 6: Final answer
    x = 258,437,434.80

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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.