Home / 305,855,999.20-458,783,998.80-272,412,978.40

Finding the Fourth Proportional to 305,855,999.20, 458,783,998.80 and 272,412,978.40

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Solution

The fourth proportional to 305,855,999.20, 458,783,998.80 and 272,412,978.40 is: 408,619,467.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,855,999.20 : 458,783,998.80 = 272,412,978.40 : x
  2. Step 2: Convert to fraction form
    305,855,999.20/458,783,998.80 = 272,412,978.40/x
  3. Step 3: Cross multiply
    305,855,999.20x = 458,783,998.80 × 272,412,978.40
  4. Step 4: Simplify right side
    305,855,999.20x = 124,978,715,555,370,016
  5. Step 5: Solve for x
    x = 124,978,715,555,370,016/305,855,999.20
  6. Step 6: Final answer
    x = 408,619,467.60

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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.