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Finding the Fourth Proportional to 918.83, 1,378.09 and 333.73

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Solution

The fourth proportional to 918.83, 1,378.09 and 333.73 is: 500.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.83 : 1,378.09 = 333.73 : x
  2. Step 2: Convert to fraction form
    918.83/1,378.09 = 333.73/x
  3. Step 3: Cross multiply
    918.83x = 1,378.09 × 333.73
  4. Step 4: Simplify right side
    918.83x = 459,909.98
  5. Step 5: Solve for x
    x = 459,909.98/918.83
  6. Step 6: Final answer
    x = 500.54

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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.