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Finding the Fourth Proportional to 485,560.31, 728,635.72 and 205,077.56

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Solution

The fourth proportional to 485,560.31, 728,635.72 and 205,077.56 is: 307,741.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,560.31 : 728,635.72 = 205,077.56 : x
  2. Step 2: Convert to fraction form
    485,560.31/728,635.72 = 205,077.56/x
  3. Step 3: Cross multiply
    485,560.31x = 728,635.72 × 205,077.56
  4. Step 4: Simplify right side
    485,560.31x = 149,426,836,895.34
  5. Step 5: Solve for x
    x = 149,426,836,895.34/485,560.31
  6. Step 6: Final answer
    x = 307,741.04

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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.