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Finding the Fourth Proportional to 429,582.69, 641,233.56 and 398,359.62

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Solution

The fourth proportional to 429,582.69, 641,233.56 and 398,359.62 is: 594,627.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,582.69 : 641,233.56 = 398,359.62 : x
  2. Step 2: Convert to fraction form
    429,582.69/641,233.56 = 398,359.62/x
  3. Step 3: Cross multiply
    429,582.69x = 641,233.56 × 398,359.62
  4. Step 4: Simplify right side
    429,582.69x = 255,441,558,786.70
  5. Step 5: Solve for x
    x = 255,441,558,786.70/429,582.69
  6. Step 6: Final answer
    x = 594,627.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.