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Finding the Fourth Proportional to 629,114.16, 868,754.52 and 399,747

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Solution

The fourth proportional to 629,114.16, 868,754.52 and 399,747 is: 552,017.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,114.16 : 868,754.52 = 399,747 : x
  2. Step 2: Convert to fraction form
    629,114.16/868,754.52 = 399,747/x
  3. Step 3: Cross multiply
    629,114.16x = 868,754.52 × 399,747
  4. Step 4: Simplify right side
    629,114.16x = 347,282,013,106.44
  5. Step 5: Solve for x
    x = 347,282,013,106.44/629,114.16
  6. Step 6: Final answer
    x = 552,017.48

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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.