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Finding the Fourth Proportional to 485,403.36, 728,037 and 204,855

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Solution

The fourth proportional to 485,403.36, 728,037 and 204,855 is: 307,253.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,403.36 : 728,037 = 204,855 : x
  2. Step 2: Convert to fraction form
    485,403.36/728,037 = 204,855/x
  3. Step 3: Cross multiply
    485,403.36x = 728,037 × 204,855
  4. Step 4: Simplify right side
    485,403.36x = 149,142,019,635
  5. Step 5: Solve for x
    x = 149,142,019,635/485,403.36
  6. Step 6: Final answer
    x = 307,253.79

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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.