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Finding the Fourth Proportional to 621,651.36, 857,874.96 and 353,379.36

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Solution

The fourth proportional to 621,651.36, 857,874.96 and 353,379.36 is: 487,661.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,651.36 : 857,874.96 = 353,379.36 : x
  2. Step 2: Convert to fraction form
    621,651.36/857,874.96 = 353,379.36/x
  3. Step 3: Cross multiply
    621,651.36x = 857,874.96 × 353,379.36
  4. Step 4: Simplify right side
    621,651.36x = 303,155,304,324.83
  5. Step 5: Solve for x
    x = 303,155,304,324.83/621,651.36
  6. Step 6: Final answer
    x = 487,661.29

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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.