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Finding the Fourth Proportional to 629,668.71, 868,615.45 and 399,832.76

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Solution

The fourth proportional to 629,668.71, 868,615.45 and 399,832.76 is: 551,561.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,668.71 : 868,615.45 = 399,832.76 : x
  2. Step 2: Convert to fraction form
    629,668.71/868,615.45 = 399,832.76/x
  3. Step 3: Cross multiply
    629,668.71x = 868,615.45 × 399,832.76
  4. Step 4: Simplify right side
    629,668.71x = 347,300,913,924.10
  5. Step 5: Solve for x
    x = 347,300,913,924.10/629,668.71
  6. Step 6: Final answer
    x = 551,561.33

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1.5x scale

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.