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Finding the Fourth Proportional to 722,039.56, 996,676.32 and 420,233.56

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Solution

The fourth proportional to 722,039.56, 996,676.32 and 420,233.56 is: 580,074.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,039.56 : 996,676.32 = 420,233.56 : x
  2. Step 2: Convert to fraction form
    722,039.56/996,676.32 = 420,233.56/x
  3. Step 3: Cross multiply
    722,039.56x = 996,676.32 × 420,233.56
  4. Step 4: Simplify right side
    722,039.56x = 418,836,838,121.30
  5. Step 5: Solve for x
    x = 418,836,838,121.30/722,039.56
  6. Step 6: Final answer
    x = 580,074.64

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1.5x scale

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.