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Finding the Fourth Proportional to 402,392.20, 603,661.20 and 202,208.80

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Solution

The fourth proportional to 402,392.20, 603,661.20 and 202,208.80 is: 303,349.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,392.20 : 603,661.20 = 202,208.80 : x
  2. Step 2: Convert to fraction form
    402,392.20/603,661.20 = 202,208.80/x
  3. Step 3: Cross multiply
    402,392.20x = 603,661.20 × 202,208.80
  4. Step 4: Simplify right side
    402,392.20x = 122,065,606,858.56
  5. Step 5: Solve for x
    x = 122,065,606,858.56/402,392.20
  6. Step 6: Final answer
    x = 303,349.83

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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.