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Finding the Fourth Proportional to 402.37, 603.34 and 219.71

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Solution

The fourth proportional to 402.37, 603.34 and 219.71 is: 329.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.37 : 603.34 = 219.71 : x
  2. Step 2: Convert to fraction form
    402.37/603.34 = 219.71/x
  3. Step 3: Cross multiply
    402.37x = 603.34 × 219.71
  4. Step 4: Simplify right side
    402.37x = 132,559.83
  5. Step 5: Solve for x
    x = 132,559.83/402.37
  6. Step 6: Final answer
    x = 329.45

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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.