Home / 725,835.79-1,001,669.65-399,128.09

Finding the Fourth Proportional to 725,835.79, 1,001,669.65 and 399,128.09

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Solution

The fourth proportional to 725,835.79, 1,001,669.65 and 399,128.09 is: 550,805.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,835.79 : 1,001,669.65 = 399,128.09 : x
  2. Step 2: Convert to fraction form
    725,835.79/1,001,669.65 = 399,128.09/x
  3. Step 3: Cross multiply
    725,835.79x = 1,001,669.65 × 399,128.09
  4. Step 4: Simplify right side
    725,835.79x = 399,794,494,215.47
  5. Step 5: Solve for x
    x = 399,794,494,215.47/725,835.79
  6. Step 6: Final answer
    x = 550,805.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.