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Finding the Fourth Proportional to 623,846, 860,991.72 and 351,969.68

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Solution

The fourth proportional to 623,846, 860,991.72 and 351,969.68 is: 485,765.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,846 : 860,991.72 = 351,969.68 : x
  2. Step 2: Convert to fraction form
    623,846/860,991.72 = 351,969.68/x
  3. Step 3: Cross multiply
    623,846x = 860,991.72 × 351,969.68
  4. Step 4: Simplify right side
    623,846x = 303,042,980,171.05
  5. Step 5: Solve for x
    x = 303,042,980,171.05/623,846
  6. Step 6: Final answer
    x = 485,765.69

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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.