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Finding the Fourth Proportional to 604.50, 907.20 and 219.75

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Solution

The fourth proportional to 604.50, 907.20 and 219.75 is: 329.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.50 : 907.20 = 219.75 : x
  2. Step 2: Convert to fraction form
    604.50/907.20 = 219.75/x
  3. Step 3: Cross multiply
    604.50x = 907.20 × 219.75
  4. Step 4: Simplify right side
    604.50x = 199,357.20
  5. Step 5: Solve for x
    x = 199,357.20/604.50
  6. Step 6: Final answer
    x = 329.79

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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.