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Finding the Fourth Proportional to 285,309.56, 393,724.37 and 154,486.59

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Solution

The fourth proportional to 285,309.56, 393,724.37 and 154,486.59 is: 213,189.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,309.56 : 393,724.37 = 154,486.59 : x
  2. Step 2: Convert to fraction form
    285,309.56/393,724.37 = 154,486.59/x
  3. Step 3: Cross multiply
    285,309.56x = 393,724.37 × 154,486.59
  4. Step 4: Simplify right side
    285,309.56x = 60,825,134,230.95
  5. Step 5: Solve for x
    x = 60,825,134,230.95/285,309.56
  6. Step 6: Final answer
    x = 213,189.96

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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.