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Finding the Fourth Proportional to 663,648.72, 915,912.98 and 377,211.85

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Solution

The fourth proportional to 663,648.72, 915,912.98 and 377,211.85 is: 520,596.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,648.72 : 915,912.98 = 377,211.85 : x
  2. Step 2: Convert to fraction form
    663,648.72/915,912.98 = 377,211.85/x
  3. Step 3: Cross multiply
    663,648.72x = 915,912.98 × 377,211.85
  4. Step 4: Simplify right side
    663,648.72x = 345,493,229,624.81
  5. Step 5: Solve for x
    x = 345,493,229,624.81/663,648.72
  6. Step 6: Final answer
    x = 520,596.54

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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.