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Finding the Fourth Proportional to 479,646.36, 661,913.42 and 261,855.39

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Solution

The fourth proportional to 479,646.36, 661,913.42 and 261,855.39 is: 361,361.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,646.36 : 661,913.42 = 261,855.39 : x
  2. Step 2: Convert to fraction form
    479,646.36/661,913.42 = 261,855.39/x
  3. Step 3: Cross multiply
    479,646.36x = 661,913.42 × 261,855.39
  4. Step 4: Simplify right side
    479,646.36x = 173,325,595,431.06
  5. Step 5: Solve for x
    x = 173,325,595,431.06/479,646.36
  6. Step 6: Final answer
    x = 361,361.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.