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Finding the Fourth Proportional to 621,496.27, 858,509.11 and 487,225.41

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Solution

The fourth proportional to 621,496.27, 858,509.11 and 487,225.41 is: 673,032.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,496.27 : 858,509.11 = 487,225.41 : x
  2. Step 2: Convert to fraction form
    621,496.27/858,509.11 = 487,225.41/x
  3. Step 3: Cross multiply
    621,496.27x = 858,509.11 × 487,225.41
  4. Step 4: Simplify right side
    621,496.27x = 418,287,448,815.94
  5. Step 5: Solve for x
    x = 418,287,448,815.94/621,496.27
  6. Step 6: Final answer
    x = 673,032.92

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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.