Home / 821,414.24-1,230,109.31-678,384.44

Finding the Fourth Proportional to 821,414.24, 1,230,109.31 and 678,384.44

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Solution

The fourth proportional to 821,414.24, 1,230,109.31 and 678,384.44 is: 1,015,914.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,414.24 : 1,230,109.31 = 678,384.44 : x
  2. Step 2: Convert to fraction form
    821,414.24/1,230,109.31 = 678,384.44/x
  3. Step 3: Cross multiply
    821,414.24x = 1,230,109.31 × 678,384.44
  4. Step 4: Simplify right side
    821,414.24x = 834,487,015,561.46
  5. Step 5: Solve for x
    x = 834,487,015,561.46/821,414.24
  6. Step 6: Final answer
    x = 1,015,914.96

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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.