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Finding the Fourth Proportional to 485,278.56, 728,016.26 and 169,956.90

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Solution

The fourth proportional to 485,278.56, 728,016.26 and 169,956.90 is: 254,969.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,278.56 : 728,016.26 = 169,956.90 : x
  2. Step 2: Convert to fraction form
    485,278.56/728,016.26 = 169,956.90/x
  3. Step 3: Cross multiply
    485,278.56x = 728,016.26 × 169,956.90
  4. Step 4: Simplify right side
    485,278.56x = 123,731,385,849.41
  5. Step 5: Solve for x
    x = 123,731,385,849.41/485,278.56
  6. Step 6: Final answer
    x = 254,969.82

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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.