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Finding the Fourth Proportional to 485,648.11, 728,297.20 and 205,187.23

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Solution

The fourth proportional to 485,648.11, 728,297.20 and 205,187.23 is: 307,706.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,648.11 : 728,297.20 = 205,187.23 : x
  2. Step 2: Convert to fraction form
    485,648.11/728,297.20 = 205,187.23/x
  3. Step 3: Cross multiply
    485,648.11x = 728,297.20 × 205,187.23
  4. Step 4: Simplify right side
    485,648.11x = 149,437,285,084.76
  5. Step 5: Solve for x
    x = 149,437,285,084.76/485,648.11
  6. Step 6: Final answer
    x = 307,706.92

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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.