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Finding the Fourth Proportional to 402,589.20, 603,956.70 and 202,405.80

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Solution

The fourth proportional to 402,589.20, 603,956.70 and 202,405.80 is: 303,645.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,589.20 : 603,956.70 = 202,405.80 : x
  2. Step 2: Convert to fraction form
    402,589.20/603,956.70 = 202,405.80/x
  3. Step 3: Cross multiply
    402,589.20x = 603,956.70 × 202,405.80
  4. Step 4: Simplify right side
    402,589.20x = 122,244,339,028.86
  5. Step 5: Solve for x
    x = 122,244,339,028.86/402,589.20
  6. Step 6: Final answer
    x = 303,645.35

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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.