Home / 821,278.96-1,231,704.60-347,720.56

Finding the Fourth Proportional to 821,278.96, 1,231,704.60 and 347,720.56

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Solution

The fourth proportional to 821,278.96, 1,231,704.60 and 347,720.56 is: 521,490.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,278.96 : 1,231,704.60 = 347,720.56 : x
  2. Step 2: Convert to fraction form
    821,278.96/1,231,704.60 = 347,720.56/x
  3. Step 3: Cross multiply
    821,278.96x = 1,231,704.60 × 347,720.56
  4. Step 4: Simplify right side
    821,278.96x = 428,289,013,266.58
  5. Step 5: Solve for x
    x = 428,289,013,266.58/821,278.96
  6. Step 6: Final answer
    x = 521,490.30

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1.5x scale

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.