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Finding the Fourth Proportional to 279,712.97, 386,031.77 and 170,811.30

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Solution

The fourth proportional to 279,712.97, 386,031.77 and 170,811.30 is: 235,736.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,712.97 : 386,031.77 = 170,811.30 : x
  2. Step 2: Convert to fraction form
    279,712.97/386,031.77 = 170,811.30/x
  3. Step 3: Cross multiply
    279,712.97x = 386,031.77 × 170,811.30
  4. Step 4: Simplify right side
    279,712.97x = 65,938,587,620.94
  5. Step 5: Solve for x
    x = 65,938,587,620.94/279,712.97
  6. Step 6: Final answer
    x = 235,736.62

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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.