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Finding the Fourth Proportional to 636,379.72, 878,207.32 and 349,918.26

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Solution

The fourth proportional to 636,379.72, 878,207.32 and 349,918.26 is: 482,889.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,379.72 : 878,207.32 = 349,918.26 : x
  2. Step 2: Convert to fraction form
    636,379.72/878,207.32 = 349,918.26/x
  3. Step 3: Cross multiply
    636,379.72x = 878,207.32 × 349,918.26
  4. Step 4: Simplify right side
    636,379.72x = 307,300,777,333.66
  5. Step 5: Solve for x
    x = 307,300,777,333.66/636,379.72
  6. Step 6: Final answer
    x = 482,889.02

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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.