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Finding the Fourth Proportional to 402,855.20, 603,553.80 and 192,028.40

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Solution

The fourth proportional to 402,855.20, 603,553.80 and 192,028.40 is: 287,695.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,855.20 : 603,553.80 = 192,028.40 : x
  2. Step 2: Convert to fraction form
    402,855.20/603,553.80 = 192,028.40/x
  3. Step 3: Cross multiply
    402,855.20x = 603,553.80 × 192,028.40
  4. Step 4: Simplify right side
    402,855.20x = 115,899,470,527.92
  5. Step 5: Solve for x
    x = 115,899,470,527.92/402,855.20
  6. Step 6: Final answer
    x = 287,695.11

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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.