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Finding the Fourth Proportional to 485,969.82, 728,961.21 and 170,435.94

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Solution

The fourth proportional to 485,969.82, 728,961.21 and 170,435.94 is: 255,656.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,969.82 : 728,961.21 = 170,435.94 : x
  2. Step 2: Convert to fraction form
    485,969.82/728,961.21 = 170,435.94/x
  3. Step 3: Cross multiply
    485,969.82x = 728,961.21 × 170,435.94
  4. Step 4: Simplify right side
    485,969.82x = 124,241,189,049.89
  5. Step 5: Solve for x
    x = 124,241,189,049.89/485,969.82
  6. Step 6: Final answer
    x = 255,656.18

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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.