Home / 821,486.72-1,229,426.40-688,517.12

Finding the Fourth Proportional to 821,486.72, 1,229,426.40 and 688,517.12

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Solution

The fourth proportional to 821,486.72, 1,229,426.40 and 688,517.12 is: 1,030,425.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,486.72 : 1,229,426.40 = 688,517.12 : x
  2. Step 2: Convert to fraction form
    821,486.72/1,229,426.40 = 688,517.12/x
  3. Step 3: Cross multiply
    821,486.72x = 1,229,426.40 × 688,517.12
  4. Step 4: Simplify right side
    821,486.72x = 846,481,124,179.97
  5. Step 5: Solve for x
    x = 846,481,124,179.97/821,486.72
  6. Step 6: Final answer
    x = 1,030,425.82

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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.