Home / 667,917.80-999,908.40-443,531.60

Finding the Fourth Proportional to 667,917.80, 999,908.40 and 443,531.60

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Solution

The fourth proportional to 667,917.80, 999,908.40 and 443,531.60 is: 663,990.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,917.80 : 999,908.40 = 443,531.60 : x
  2. Step 2: Convert to fraction form
    667,917.80/999,908.40 = 443,531.60/x
  3. Step 3: Cross multiply
    667,917.80x = 999,908.40 × 443,531.60
  4. Step 4: Simplify right side
    667,917.80x = 443,490,972,505.44
  5. Step 5: Solve for x
    x = 443,490,972,505.44/667,917.80
  6. Step 6: Final answer
    x = 663,990.35

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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.