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Finding the Fourth Proportional to 629,117, 868,191.36 and 342,636.86

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Solution

The fourth proportional to 629,117, 868,191.36 and 342,636.86 is: 472,844.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,117 : 868,191.36 = 342,636.86 : x
  2. Step 2: Convert to fraction form
    629,117/868,191.36 = 342,636.86/x
  3. Step 3: Cross multiply
    629,117x = 868,191.36 × 342,636.86
  4. Step 4: Simplify right side
    629,117x = 297,474,361,469.53
  5. Step 5: Solve for x
    x = 297,474,361,469.53/629,117
  6. Step 6: Final answer
    x = 472,844.26

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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.