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Finding the Fourth Proportional to 386,297.40, 579,407.22 and 105,855.96

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Solution

The fourth proportional to 386,297.40, 579,407.22 and 105,855.96 is: 158,773.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,297.40 : 579,407.22 = 105,855.96 : x
  2. Step 2: Convert to fraction form
    386,297.40/579,407.22 = 105,855.96/x
  3. Step 3: Cross multiply
    386,297.40x = 579,407.22 × 105,855.96
  4. Step 4: Simplify right side
    386,297.40x = 61,333,707,504.03
  5. Step 5: Solve for x
    x = 61,333,707,504.03/386,297.40
  6. Step 6: Final answer
    x = 158,773.29

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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.