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Finding the Fourth Proportional to 343,356.97, 515,100.07 and 138,207.31

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Solution

The fourth proportional to 343,356.97, 515,100.07 and 138,207.31 is: 207,336.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,356.97 : 515,100.07 = 138,207.31 : x
  2. Step 2: Convert to fraction form
    343,356.97/515,100.07 = 138,207.31/x
  3. Step 3: Cross multiply
    343,356.97x = 515,100.07 × 138,207.31
  4. Step 4: Simplify right side
    343,356.97x = 71,190,595,055.51
  5. Step 5: Solve for x
    x = 71,190,595,055.51/343,356.97
  6. Step 6: Final answer
    x = 207,336.97

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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.