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Finding the Fourth Proportional to 515,945.09, 773,128.60 and 216,262.31

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Solution

The fourth proportional to 515,945.09, 773,128.60 and 216,262.31 is: 324,062.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,945.09 : 773,128.60 = 216,262.31 : x
  2. Step 2: Convert to fraction form
    515,945.09/773,128.60 = 216,262.31/x
  3. Step 3: Cross multiply
    515,945.09x = 773,128.60 × 216,262.31
  4. Step 4: Simplify right side
    515,945.09x = 167,198,572,556.77
  5. Step 5: Solve for x
    x = 167,198,572,556.77/515,945.09
  6. Step 6: Final answer
    x = 324,062.72

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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.