Home / 685,701.78-1,028,354.04-205,910.22

Finding the Fourth Proportional to 685,701.78, 1,028,354.04 and 205,910.22

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Solution

The fourth proportional to 685,701.78, 1,028,354.04 and 205,910.22 is: 308,805.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,701.78 : 1,028,354.04 = 205,910.22 : x
  2. Step 2: Convert to fraction form
    685,701.78/1,028,354.04 = 205,910.22/x
  3. Step 3: Cross multiply
    685,701.78x = 1,028,354.04 × 205,910.22
  4. Step 4: Simplify right side
    685,701.78x = 211,748,606,614.29
  5. Step 5: Solve for x
    x = 211,748,606,614.29/685,701.78
  6. Step 6: Final answer
    x = 308,805.68

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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.