Home / 667,705.20-921,431.87-361,789.85

Finding the Fourth Proportional to 667,705.20, 921,431.87 and 361,789.85

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Solution

The fourth proportional to 667,705.20, 921,431.87 and 361,789.85 is: 499,269.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,705.20 : 921,431.87 = 361,789.85 : x
  2. Step 2: Convert to fraction form
    667,705.20/921,431.87 = 361,789.85/x
  3. Step 3: Cross multiply
    667,705.20x = 921,431.87 × 361,789.85
  4. Step 4: Simplify right side
    667,705.20x = 333,364,691,616.41
  5. Step 5: Solve for x
    x = 333,364,691,616.41/667,705.20
  6. Step 6: Final answer
    x = 499,269.28

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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.