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Finding the Fourth Proportional to 642,910.30, 964,297.80 and 263,871.12

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Solution

The fourth proportional to 642,910.30, 964,297.80 and 263,871.12 is: 395,778.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,910.30 : 964,297.80 = 263,871.12 : x
  2. Step 2: Convert to fraction form
    642,910.30/964,297.80 = 263,871.12/x
  3. Step 3: Cross multiply
    642,910.30x = 964,297.80 × 263,871.12
  4. Step 4: Simplify right side
    642,910.30x = 254,450,340,499.54
  5. Step 5: Solve for x
    x = 254,450,340,499.54/642,910.30
  6. Step 6: Final answer
    x = 395,778.91

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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.