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Finding the Fourth Proportional to 306,331.76, 422,686.32 and 170,347.88

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Solution

The fourth proportional to 306,331.76, 422,686.32 and 170,347.88 is: 235,051.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,331.76 : 422,686.32 = 170,347.88 : x
  2. Step 2: Convert to fraction form
    306,331.76/422,686.32 = 170,347.88/x
  3. Step 3: Cross multiply
    306,331.76x = 422,686.32 × 170,347.88
  4. Step 4: Simplify right side
    306,331.76x = 72,003,718,517.00
  5. Step 5: Solve for x
    x = 72,003,718,517.00/306,331.76
  6. Step 6: Final answer
    x = 235,051.43

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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.