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Finding the Fourth Proportional to 678,263.84, 936,048.28 and 391,796

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Solution

The fourth proportional to 678,263.84, 936,048.28 and 391,796 is: 540,704.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,263.84 : 936,048.28 = 391,796 : x
  2. Step 2: Convert to fraction form
    678,263.84/936,048.28 = 391,796/x
  3. Step 3: Cross multiply
    678,263.84x = 936,048.28 × 391,796
  4. Step 4: Simplify right side
    678,263.84x = 366,739,971,910.88
  5. Step 5: Solve for x
    x = 366,739,971,910.88/678,263.84
  6. Step 6: Final answer
    x = 540,704.00

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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.