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Finding the Fourth Proportional to 629,111.16, 868,750.38 and 399,744

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Solution

The fourth proportional to 629,111.16, 868,750.38 and 399,744 is: 552,013.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,111.16 : 868,750.38 = 399,744 : x
  2. Step 2: Convert to fraction form
    629,111.16/868,750.38 = 399,744/x
  3. Step 3: Cross multiply
    629,111.16x = 868,750.38 × 399,744
  4. Step 4: Simplify right side
    629,111.16x = 347,277,751,902.72
  5. Step 5: Solve for x
    x = 347,277,751,902.72/629,111.16
  6. Step 6: Final answer
    x = 552,013.34

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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.