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Finding the Fourth Proportional to 485,559.56, 728,634.59 and 205,076.81

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Solution

The fourth proportional to 485,559.56, 728,634.59 and 205,076.81 is: 307,739.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,559.56 : 728,634.59 = 205,076.81 : x
  2. Step 2: Convert to fraction form
    485,559.56/728,634.59 = 205,076.81/x
  3. Step 3: Cross multiply
    485,559.56x = 728,634.59 × 205,076.81
  4. Step 4: Simplify right side
    485,559.56x = 149,426,058,938.10
  5. Step 5: Solve for x
    x = 149,426,058,938.10/485,559.56
  6. Step 6: Final answer
    x = 307,739.92

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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.