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Finding the Fourth Proportional to 603,379.40, 905,057.22 and 243,540.70

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Solution

The fourth proportional to 603,379.40, 905,057.22 and 243,540.70 is: 365,306.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,379.40 : 905,057.22 = 243,540.70 : x
  2. Step 2: Convert to fraction form
    603,379.40/905,057.22 = 243,540.70/x
  3. Step 3: Cross multiply
    603,379.40x = 905,057.22 × 243,540.70
  4. Step 4: Simplify right side
    603,379.40x = 220,418,268,898.85
  5. Step 5: Solve for x
    x = 220,418,268,898.85/603,379.40
  6. Step 6: Final answer
    x = 365,306.25

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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.