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Finding the Fourth Proportional to 518,933.39, 778,342.16 and 139,891.86

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Solution

The fourth proportional to 518,933.39, 778,342.16 and 139,891.86 is: 209,822.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,933.39 : 778,342.16 = 139,891.86 : x
  2. Step 2: Convert to fraction form
    518,933.39/778,342.16 = 139,891.86/x
  3. Step 3: Cross multiply
    518,933.39x = 778,342.16 × 139,891.86
  4. Step 4: Simplify right side
    518,933.39x = 108,883,732,828.55
  5. Step 5: Solve for x
    x = 108,883,732,828.55/518,933.39
  6. Step 6: Final answer
    x = 209,822.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.