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Finding the Fourth Proportional to 629,614.64, 868,842.90 and 343,128.57

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Solution

The fourth proportional to 629,614.64, 868,842.90 and 343,128.57 is: 473,503.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,614.64 : 868,842.90 = 343,128.57 : x
  2. Step 2: Convert to fraction form
    629,614.64/868,842.90 = 343,128.57/x
  3. Step 3: Cross multiply
    629,614.64x = 868,842.90 × 343,128.57
  4. Step 4: Simplify right side
    629,614.64x = 298,124,821,831.65
  5. Step 5: Solve for x
    x = 298,124,821,831.65/629,614.64
  6. Step 6: Final answer
    x = 473,503.64

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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.