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Finding the Fourth Proportional to 621,751.86, 858,017.58 and 353,479.86

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Solution

The fourth proportional to 621,751.86, 858,017.58 and 353,479.86 is: 487,802.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,751.86 : 858,017.58 = 353,479.86 : x
  2. Step 2: Convert to fraction form
    621,751.86/858,017.58 = 353,479.86/x
  3. Step 3: Cross multiply
    621,751.86x = 858,017.58 × 353,479.86
  4. Step 4: Simplify right side
    621,751.86x = 303,291,934,055.94
  5. Step 5: Solve for x
    x = 303,291,934,055.94/621,751.86
  6. Step 6: Final answer
    x = 487,802.21

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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.