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Finding the Fourth Proportional to 629,076.16, 868,005.82 and 399,670.79

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Solution

The fourth proportional to 629,076.16, 868,005.82 and 399,670.79 is: 551,469.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,076.16 : 868,005.82 = 399,670.79 : x
  2. Step 2: Convert to fraction form
    629,076.16/868,005.82 = 399,670.79/x
  3. Step 3: Cross multiply
    629,076.16x = 868,005.82 × 399,670.79
  4. Step 4: Simplify right side
    629,076.16x = 346,916,572,846.09
  5. Step 5: Solve for x
    x = 346,916,572,846.09/629,076.16
  6. Step 6: Final answer
    x = 551,469.91

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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.