Home / 1,387,999.20-2,081,998.80-1,072,682.40

Finding the Fourth Proportional to 1,387,999.20, 2,081,998.80 and 1,072,682.40

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Solution

The fourth proportional to 1,387,999.20, 2,081,998.80 and 1,072,682.40 is: 1,609,023.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,999.20 : 2,081,998.80 = 1,072,682.40 : x
  2. Step 2: Convert to fraction form
    1,387,999.20/2,081,998.80 = 1,072,682.40/x
  3. Step 3: Cross multiply
    1,387,999.20x = 2,081,998.80 × 1,072,682.40
  4. Step 4: Simplify right side
    1,387,999.20x = 2,233,323,469,581.12
  5. Step 5: Solve for x
    x = 2,233,323,469,581.12/1,387,999.20
  6. Step 6: Final answer
    x = 1,609,023.60

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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.