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Finding the Fourth Proportional to 678,852.66, 936,712.53 and 392,317.41

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Solution

The fourth proportional to 678,852.66, 936,712.53 and 392,317.41 is: 541,337.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,852.66 : 936,712.53 = 392,317.41 : x
  2. Step 2: Convert to fraction form
    678,852.66/936,712.53 = 392,317.41/x
  3. Step 3: Cross multiply
    678,852.66x = 936,712.53 × 392,317.41
  4. Step 4: Simplify right side
    678,852.66x = 367,488,633,684.15
  5. Step 5: Solve for x
    x = 367,488,633,684.15/678,852.66
  6. Step 6: Final answer
    x = 541,337.84

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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.